<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2021 Workiva-->
<!--r:703faea8-9e1f-40c8-8ecd-3a14558ecdb2,g:170ffdd4-27e3-46ac-a954-98c4b544e6e8-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.lpcorp.com/role/CoverPage" xlink:type="simple" xlink:href="lpx-20210930.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/CoverPage" xlink:type="extended" id="i696508b96bf44b56a4934dda300c60e7_CoverPage">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_caa4c252-cb78-4788-a418-2ff04a0219fe" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityIncorporationStateCountryCode_caa4c252-cb78-4788-a418-2ff04a0219fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_5ef677a5-0de8-4a6c-bd9a-0d1451d7af08" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_Security12bTitle_5ef677a5-0de8-4a6c-bd9a-0d1451d7af08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_3c663f57-abd4-4350-aaab-f969dfe6b847" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityTaxIdentificationNumber_3c663f57-abd4-4350-aaab-f969dfe6b847" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_9153750f-ef41-4a40-bcdb-c6f789eaf1a0" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_TradingSymbol_9153750f-ef41-4a40-bcdb-c6f789eaf1a0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_ede96cb5-832e-4c37-9597-0528dc0b6b94" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityRegistrantName_ede96cb5-832e-4c37-9597-0528dc0b6b94" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_1f260169-705e-4529-a4cd-18c0a3f0ed97" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityAddressAddressLine1_1f260169-705e-4529-a4cd-18c0a3f0ed97" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_47a66db6-07d6-4565-91cc-e5563fcfc16d" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressAddressLine2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityAddressAddressLine2_47a66db6-07d6-4565-91cc-e5563fcfc16d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_6887c402-54f4-4dd5-87d4-c4698421da71" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityAddressCityOrTown_6887c402-54f4-4dd5-87d4-c4698421da71" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_1f150458-c765-4ce6-810a-f36546f5101a" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityAddressStateOrProvince_1f150458-c765-4ce6-810a-f36546f5101a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_40fcccd2-041b-4baa-b887-409559956182" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityAddressPostalZipCode_40fcccd2-041b-4baa-b887-409559956182" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_944f3064-86d4-49d5-9ec3-3258a0e09307" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_CityAreaCode_944f3064-86d4-49d5-9ec3-3258a0e09307" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_26adc5fe-4b4d-48ca-9c28-af5c6da96b60" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_LocalPhoneNumber_26adc5fe-4b4d-48ca-9c28-af5c6da96b60" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_b7533bc7-cbc6-4159-925d-696acc3cdf82" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityCentralIndexKey_b7533bc7-cbc6-4159-925d-696acc3cdf82" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_bc3b7d95-5682-42c4-9336-6cf18211e132" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_CurrentFiscalYearEndDate_bc3b7d95-5682-42c4-9336-6cf18211e132" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_469beb9b-9f32-4c25-b08b-aca95e71efc9" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_DocumentType_469beb9b-9f32-4c25-b08b-aca95e71efc9" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_3b87aa37-b174-46e4-a205-c5ae0972842b" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_DocumentPeriodEndDate_3b87aa37-b174-46e4-a205-c5ae0972842b" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_2996ed95-6a1b-49f9-923a-016118c6392c" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityFileNumber_2996ed95-6a1b-49f9-923a-016118c6392c" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_d2d1fafa-e432-4263-80a0-446acac6863d" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_DocumentFiscalYearFocus_d2d1fafa-e432-4263-80a0-446acac6863d" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_1d08a1db-b809-4eb7-bf8a-c6589d93bfe7" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_DocumentFiscalPeriodFocus_1d08a1db-b809-4eb7-bf8a-c6589d93bfe7" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_fdf9d09d-c0a8-4b58-b770-64cf82f162c6" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_AmendmentFlag_fdf9d09d-c0a8-4b58-b770-64cf82f162c6" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_72ff0c83-f404-4d2a-8c42-3779dafac99c" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_DocumentQuarterlyReport_72ff0c83-f404-4d2a-8c42-3779dafac99c" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_e57157fa-f0ec-417e-b05c-bcb785252a27" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_DocumentTransitionReport_e57157fa-f0ec-417e-b05c-bcb785252a27" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_f87cab4d-176f-4fb1-9051-2f9926e73637" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityInteractiveDataCurrent_f87cab4d-176f-4fb1-9051-2f9926e73637" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_5bac09d3-1a79-4b4d-b168-f6e08fa49e1c" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_5bac09d3-1a79-4b4d-b168-f6e08fa49e1c" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_8552f947-b929-40a8-a253-43e5c8a552e1" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_SecurityExchangeName_8552f947-b929-40a8-a253-43e5c8a552e1" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_55a7a2d6-7492-4e83-bb21-cacb291d693e" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityFilerCategory_55a7a2d6-7492-4e83-bb21-cacb291d693e" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_db3506f8-9305-4643-b0f2-c4764df91936" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityShellCompany_db3506f8-9305-4643-b0f2-c4764df91936" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_98b7c953-e155-4c1b-a3f6-d2979025ce85" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityEmergingGrowthCompany_98b7c953-e155-4c1b-a3f6-d2979025ce85" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_b2f56a4e-0181-4d32-b502-50427c6755d9" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntitySmallBusiness_b2f56a4e-0181-4d32-b502-50427c6755d9" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_93f0e938-ca27-4bb4-b923-4a6029883aab" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntityCurrentReportingStatus_93f0e938-ca27-4bb4-b923-4a6029883aab" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_53c5c839-46ea-4f98-ac35-333c50e3af60" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_0972a8cc-6a95-4d20-84d1-07fcfbd8b1d1" xlink:to="loc_dei_EntitiesTable_53c5c839-46ea-4f98-ac35-333c50e3af60" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_266fc984-ae79-4f98-8970-d4a39ee50160" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_53c5c839-46ea-4f98-ac35-333c50e3af60" xlink:to="loc_dei_LegalEntityAxis_266fc984-ae79-4f98-8970-d4a39ee50160" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_266fc984-ae79-4f98-8970-d4a39ee50160_default" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_266fc984-ae79-4f98-8970-d4a39ee50160" xlink:to="loc_dei_EntityDomain_266fc984-ae79-4f98-8970-d4a39ee50160_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_a0f3f442-4d21-4d89-9da2-d97e6932d565" xlink:href="https://xbrl.sec.gov/dei/2021/dei-2021.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_266fc984-ae79-4f98-8970-d4a39ee50160" xlink:to="loc_dei_EntityDomain_a0f3f442-4d21-4d89-9da2-d97e6932d565" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/ConsolidatedStatementsofComprehensiveIncome" xlink:type="simple" xlink:href="lpx-20210930.xsd#ConsolidatedStatementsofComprehensiveIncome"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/ConsolidatedStatementsofComprehensiveIncome" xlink:type="extended" id="i5977907487a6432182cc5026f0934e1d_ConsolidatedStatementsofComprehensiveIncome">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_99df5eee-7ab7-43fc-88ed-3c2277be9f48" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_0450a63f-da6e-42cf-a6b8-e8f782e8b7ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_99df5eee-7ab7-43fc-88ed-3c2277be9f48" xlink:to="loc_us-gaap_ProfitLoss_0450a63f-da6e-42cf-a6b8-e8f782e8b7ab" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_84b8358d-7b3f-4a86-a99c-b8ffef2c51dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_99df5eee-7ab7-43fc-88ed-3c2277be9f48" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_84b8358d-7b3f-4a86-a99c-b8ffef2c51dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_2b58e887-6b83-4f12-9eb6-2af0aa5d4a1f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_84b8358d-7b3f-4a86-a99c-b8ffef2c51dd" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_2b58e887-6b83-4f12-9eb6-2af0aa5d4a1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_518a3cf9-893a-44de-85ae-8a180a6c33b1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_84b8358d-7b3f-4a86-a99c-b8ffef2c51dd" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_518a3cf9-893a-44de-85ae-8a180a6c33b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_d595ad7a-dfb0-4814-b598-e99a3d8bad6d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract_84b8358d-7b3f-4a86-a99c-b8ffef2c51dd" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_d595ad7a-dfb0-4814-b598-e99a3d8bad6d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_a9b3c716-6d4d-4d74-905d-e815dab9e25d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_99df5eee-7ab7-43fc-88ed-3c2277be9f48" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest_a9b3c716-6d4d-4d74-905d-e815dab9e25d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_021fbe22-0a88-4748-ada4-c0c0167a6382" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_99df5eee-7ab7-43fc-88ed-3c2277be9f48" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest_021fbe22-0a88-4748-ada4-c0c0167a6382" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_8567fa3b-e36a-4ff3-9d22-1f2713c08ad7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_99df5eee-7ab7-43fc-88ed-3c2277be9f48" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_8567fa3b-e36a-4ff3-9d22-1f2713c08ad7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_595d8696-9164-4dd8-8cc4-d821704ae6fc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_99df5eee-7ab7-43fc-88ed-3c2277be9f48" xlink:to="loc_us-gaap_StatementTable_595d8696-9164-4dd8-8cc4-d821704ae6fc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_5a586c06-0862-4a92-bb43-835602f4d63f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_595d8696-9164-4dd8-8cc4-d821704ae6fc" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_5a586c06-0862-4a92-bb43-835602f4d63f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_5a586c06-0862-4a92-bb43-835602f4d63f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5a586c06-0862-4a92-bb43-835602f4d63f" xlink:to="loc_us-gaap_EquityComponentDomain_5a586c06-0862-4a92-bb43-835602f4d63f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_72a50e5d-90b3-4c9f-aa25-961f4fd09d0e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_5a586c06-0862-4a92-bb43-835602f4d63f" xlink:to="loc_us-gaap_EquityComponentDomain_72a50e5d-90b3-4c9f-aa25-961f4fd09d0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_85c5b73f-b14a-42df-a55e-27060686fd60" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_72a50e5d-90b3-4c9f-aa25-961f4fd09d0e" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_85c5b73f-b14a-42df-a55e-27060686fd60" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_529a45a9-b65a-48f9-812c-cf5cc9cf1385" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_72a50e5d-90b3-4c9f-aa25-961f4fd09d0e" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_529a45a9-b65a-48f9-812c-cf5cc9cf1385" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/StatementofShareholdersEquityStatement" xlink:type="simple" xlink:href="lpx-20210930.xsd#StatementofShareholdersEquityStatement"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/StatementofShareholdersEquityStatement" xlink:type="extended" id="i69a50d51347c4487921640db4b1498e3_StatementofShareholdersEquityStatement">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_326f8254-cfda-4461-bbf7-ec4be96b2419" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_326f8254-cfda-4461-bbf7-ec4be96b2419" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValueOutstanding_6323ef15-6e30-44cb-84a2-99b0e6ed4b98" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockValueOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_CommonStockValueOutstanding_6323ef15-6e30-44cb-84a2-99b0e6ed4b98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_968f7f0f-54bc-44c1-a591-2b742a9a9aa3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_TreasuryStockCommonShares_968f7f0f-54bc-44c1-a591-2b742a9a9aa3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_b16c5a92-82bc-4d03-bbd8-dfbd6f18f688" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_TreasuryStockValue_b16c5a92-82bc-4d03-bbd8-dfbd6f18f688" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_f6491fb1-8fd6-40a5-840b-1c5f784cdfa0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_f6491fb1-8fd6-40a5-840b-1c5f784cdfa0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_0b5e924d-8728-411a-ad71-a5fcd299514d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_0b5e924d-8728-411a-ad71-a5fcd299514d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_56f12b5a-03c0-4792-9557-93c6d5651d16" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_56f12b5a-03c0-4792-9557-93c6d5651d16" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_29c88564-28c1-46be-b4b9-8c862b4149ab" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_NetIncomeLoss_29c88564-28c1-46be-b4b9-8c862b4149ab" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividends_52aa6fc6-49f5-4546-84ee-85727529bb17" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_PaymentsOfDividends_52aa6fc6-49f5-4546-84ee-85727529bb17" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_b51f2599-cdcc-4af7-9eea-0f9b85353e66" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_b51f2599-cdcc-4af7-9eea-0f9b85353e66" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_a9f470cc-27ed-4970-833b-1160fd50dd44" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_a9f470cc-27ed-4970-833b-1160fd50dd44" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_fa19fbdc-e989-4b0d-b3f7-8901221640f6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_fa19fbdc-e989-4b0d-b3f7-8901221640f6" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_0183f678-e3e3-4362-b14a-9f051c33909e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_0183f678-e3e3-4362-b14a-9f051c33909e" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_cc64b00d-70cf-48a2-be2f-31a0a713886d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_cc64b00d-70cf-48a2-be2f-31a0a713886d" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_ee0532bc-f2f7-4a8e-a2b5-1492bcae1ccd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_ee0532bc-f2f7-4a8e-a2b5-1492bcae1ccd" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_a11ced4d-233e-4708-b749-650d9571e5dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_StockholdersEquity_a11ced4d-233e-4708-b749-650d9571e5dd" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_CommonstockSharesacquired_3a5f43d1-0236-4863-a3dd-d0b4139b57c8" xlink:href="lpx-20210930.xsd#lpx_CommonstockSharesacquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_lpx_CommonstockSharesacquired_3a5f43d1-0236-4863-a3dd-d0b4139b57c8" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_CommonstockValueSharesacquired_e367b173-f2dd-4249-86ab-5fdd02ec8bef" xlink:href="lpx-20210930.xsd#lpx_CommonstockValueSharesacquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_lpx_CommonstockValueSharesacquired_e367b173-f2dd-4249-86ab-5fdd02ec8bef" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_cacbc0d4-35c7-4f26-becb-09d3bdb1f0a0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_11b44f00-2a9e-4468-85c2-c9a41dcd3279" xlink:to="loc_us-gaap_StatementTable_cacbc0d4-35c7-4f26-becb-09d3bdb1f0a0" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_240b5b84-b723-4a3d-8fab-4b7bd0fc0bf1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_cacbc0d4-35c7-4f26-becb-09d3bdb1f0a0" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_240b5b84-b723-4a3d-8fab-4b7bd0fc0bf1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_240b5b84-b723-4a3d-8fab-4b7bd0fc0bf1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_240b5b84-b723-4a3d-8fab-4b7bd0fc0bf1" xlink:to="loc_us-gaap_EquityComponentDomain_240b5b84-b723-4a3d-8fab-4b7bd0fc0bf1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_17266605-c7fa-4143-8017-1b0291c6e3b0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_240b5b84-b723-4a3d-8fab-4b7bd0fc0bf1" xlink:to="loc_us-gaap_EquityComponentDomain_17266605-c7fa-4143-8017-1b0291c6e3b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_e6122ea1-f80c-4278-89a3-35e8025e7751" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_17266605-c7fa-4143-8017-1b0291c6e3b0" xlink:to="loc_us-gaap_CommonStockMember_e6122ea1-f80c-4278-89a3-35e8025e7751" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockMember_f23c49f3-57be-4e46-a2cf-80239f09856c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_17266605-c7fa-4143-8017-1b0291c6e3b0" xlink:to="loc_us-gaap_TreasuryStockMember_f23c49f3-57be-4e46-a2cf-80239f09856c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_c634e257-ce10-429c-8a42-c75e69fabe7d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_17266605-c7fa-4143-8017-1b0291c6e3b0" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_c634e257-ce10-429c-8a42-c75e69fabe7d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_b9c3b620-b2e0-46da-9f7a-b24985a57bce" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_17266605-c7fa-4143-8017-1b0291c6e3b0" xlink:to="loc_us-gaap_RetainedEarningsMember_b9c3b620-b2e0-46da-9f7a-b24985a57bce" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_09c4a24c-a692-4986-bed3-7ce8077a0718" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_17266605-c7fa-4143-8017-1b0291c6e3b0" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_09c4a24c-a692-4986-bed3-7ce8077a0718" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/RevenueTables" xlink:type="simple" xlink:href="lpx-20210930.xsd#RevenueTables"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/RevenueTables" xlink:type="extended" id="ib83926f7b75c4e16b45264f808d0095f_RevenueTables">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_5402c1cd-98ba-449e-9f5d-36b236e19b5a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_142cb9b8-c976-4a2b-a227-15b0fe551157" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_5402c1cd-98ba-449e-9f5d-36b236e19b5a" xlink:to="loc_us-gaap_DisaggregationOfRevenueTableTextBlock_142cb9b8-c976-4a2b-a227-15b0fe551157" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_595f316c-e3c8-44d5-9045-2a96cd061527" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_5402c1cd-98ba-449e-9f5d-36b236e19b5a" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_595f316c-e3c8-44d5-9045-2a96cd061527" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_7ab737bb-1f52-4c73-adbe-f71564d8f6fe" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_595f316c-e3c8-44d5-9045-2a96cd061527" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_7ab737bb-1f52-4c73-adbe-f71564d8f6fe" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_7ab737bb-1f52-4c73-adbe-f71564d8f6fe_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7ab737bb-1f52-4c73-adbe-f71564d8f6fe" xlink:to="loc_us-gaap_SegmentDomain_7ab737bb-1f52-4c73-adbe-f71564d8f6fe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_4738f8e3-89b9-4b83-b3e8-7897be062f1c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7ab737bb-1f52-4c73-adbe-f71564d8f6fe" xlink:to="loc_us-gaap_SegmentDomain_4738f8e3-89b9-4b83-b3e8-7897be062f1c" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/RevenueDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#RevenueDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/RevenueDetails" xlink:type="extended" id="i53eaa36eefaf4c28a2ca10879226e8c1_RevenueDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_e7665c0d-83f4-42f1-85b6-a4c6fd06f32e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_ae8a0b9f-30c6-42b7-a3c9-f610b8917200" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_e7665c0d-83f4-42f1-85b6-a4c6fd06f32e" xlink:to="loc_us-gaap_Revenues_ae8a0b9f-30c6-42b7-a3c9-f610b8917200" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_24d4e0fb-eef5-4c41-985d-65624c29de35" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_e7665c0d-83f4-42f1-85b6-a4c6fd06f32e" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_24d4e0fb-eef5-4c41-985d-65624c29de35" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_ProducttypeAxis_4d829d67-2f8a-4c54-8220-719ed5df2464" xlink:href="lpx-20210930.xsd#lpx_ProducttypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_24d4e0fb-eef5-4c41-985d-65624c29de35" xlink:to="loc_lpx_ProducttypeAxis_4d829d67-2f8a-4c54-8220-719ed5df2464" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_ProducttypeDomain_4d829d67-2f8a-4c54-8220-719ed5df2464_default" xlink:href="lpx-20210930.xsd#lpx_ProducttypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_lpx_ProducttypeAxis_4d829d67-2f8a-4c54-8220-719ed5df2464" xlink:to="loc_lpx_ProducttypeDomain_4d829d67-2f8a-4c54-8220-719ed5df2464_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_ProducttypeDomain_c6184c03-1756-48ab-bcf2-fedeb43e8463" xlink:href="lpx-20210930.xsd#lpx_ProducttypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_lpx_ProducttypeAxis_4d829d67-2f8a-4c54-8220-719ed5df2464" xlink:to="loc_lpx_ProducttypeDomain_c6184c03-1756-48ab-bcf2-fedeb43e8463" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_ValueaddMember_f8075865-fda2-4fc3-8216-555d39f20610" xlink:href="lpx-20210930.xsd#lpx_ValueaddMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lpx_ProducttypeDomain_c6184c03-1756-48ab-bcf2-fedeb43e8463" xlink:to="loc_lpx_ValueaddMember_f8075865-fda2-4fc3-8216-555d39f20610" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_CommodityProductsMember_891bacdc-f9a8-449e-ba07-cd4f10de175a" xlink:href="lpx-20210930.xsd#lpx_CommodityProductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lpx_ProducttypeDomain_c6184c03-1756-48ab-bcf2-fedeb43e8463" xlink:to="loc_lpx_CommodityProductsMember_891bacdc-f9a8-449e-ba07-cd4f10de175a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_OtherProductTypesMember_e37f45b5-3ede-41f2-acef-85c91c18e050" xlink:href="lpx-20210930.xsd#lpx_OtherProductTypesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lpx_ProducttypeDomain_c6184c03-1756-48ab-bcf2-fedeb43e8463" xlink:to="loc_lpx_OtherProductTypesMember_e37f45b5-3ede-41f2-acef-85c91c18e050" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_OtherproductsMember_ec6c460b-fb27-4cb6-a4f7-56e7c01ddc14" xlink:href="lpx-20210930.xsd#lpx_OtherproductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lpx_ProducttypeDomain_c6184c03-1756-48ab-bcf2-fedeb43e8463" xlink:to="loc_lpx_OtherproductsMember_ec6c460b-fb27-4cb6-a4f7-56e7c01ddc14" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_8a54dce3-9a87-46a4-a754-28750c306a1f" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_24d4e0fb-eef5-4c41-985d-65624c29de35" xlink:to="loc_srt_ProductOrServiceAxis_8a54dce3-9a87-46a4-a754-28750c306a1f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8a54dce3-9a87-46a4-a754-28750c306a1f_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_8a54dce3-9a87-46a4-a754-28750c306a1f" xlink:to="loc_srt_ProductsAndServicesDomain_8a54dce3-9a87-46a4-a754-28750c306a1f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_8a54dce3-9a87-46a4-a754-28750c306a1f" xlink:to="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_SmartSideStrandsidingMember_950dbc6f-bfa1-4155-be95-851836035897" xlink:href="lpx-20210930.xsd#lpx_SmartSideStrandsidingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:to="loc_lpx_SmartSideStrandsidingMember_950dbc6f-bfa1-4155-be95-851836035897" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_OSBvalueaddMember_439be783-963e-4d57-b26a-e4edb40d6ef0" xlink:href="lpx-20210930.xsd#lpx_OSBvalueaddMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:to="loc_lpx_OSBvalueaddMember_439be783-963e-4d57-b26a-e4edb40d6ef0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_IJoistMember_caaf1850-4aa5-4317-9aec-88c912e7a064" xlink:href="lpx-20210930.xsd#lpx_IJoistMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:to="loc_lpx_IJoistMember_caaf1850-4aa5-4317-9aec-88c912e7a064" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_LVLMember_2cebacde-e6bd-44f2-b9c6-07e42fd23c13" xlink:href="lpx-20210930.xsd#lpx_LVLMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:to="loc_lpx_LVLMember_2cebacde-e6bd-44f2-b9c6-07e42fd23c13" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_LSLMember_e4348a11-34d3-49fe-b349-a25cda453464" xlink:href="lpx-20210930.xsd#lpx_LSLMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:to="loc_lpx_LSLMember_e4348a11-34d3-49fe-b349-a25cda453464" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_OSBcommodityMember_5fec1041-f777-400f-a698-f6459fe6e855" xlink:href="lpx-20210930.xsd#lpx_OSBcommodityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:to="loc_lpx_OSBcommodityMember_5fec1041-f777-400f-a698-f6459fe6e855" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_PlywoodMember_1c3387c4-8faa-4eff-b61f-8518846a59b8" xlink:href="lpx-20210930.xsd#lpx_PlywoodMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:to="loc_lpx_PlywoodMember_1c3387c4-8faa-4eff-b61f-8518846a59b8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_OtherproductsMember_488671ee-7daa-4fa8-8aa7-d999325ab4f3" xlink:href="lpx-20210930.xsd#lpx_OtherproductsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:to="loc_lpx_OtherproductsMember_488671ee-7daa-4fa8-8aa7-d999325ab4f3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_SmartSideFibersidingMember_10fe5e63-2e1d-4258-ab19-752f538613d8" xlink:href="lpx-20210930.xsd#lpx_SmartSideFibersidingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:to="loc_lpx_SmartSideFibersidingMember_10fe5e63-2e1d-4258-ab19-752f538613d8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_CanExelsidingMember_54ab1f56-0dbb-414f-8970-480bdb101819" xlink:href="lpx-20210930.xsd#lpx_CanExelsidingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ed5f8570-f05d-4f46-b637-c9cb773c8d6a" xlink:to="loc_lpx_CanExelsidingMember_54ab1f56-0dbb-414f-8970-480bdb101819" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_fc1f2736-0ce3-40d9-b503-f406ee3d9752" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_24d4e0fb-eef5-4c41-985d-65624c29de35" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_fc1f2736-0ce3-40d9-b503-f406ee3d9752" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_fc1f2736-0ce3-40d9-b503-f406ee3d9752_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_fc1f2736-0ce3-40d9-b503-f406ee3d9752" xlink:to="loc_us-gaap_SegmentDomain_fc1f2736-0ce3-40d9-b503-f406ee3d9752_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c2191869-c185-426b-9022-7ec28b889456" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_fc1f2736-0ce3-40d9-b503-f406ee3d9752" xlink:to="loc_us-gaap_SegmentDomain_c2191869-c185-426b-9022-7ec28b889456" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_SidingMember_6fd6af17-dd00-40f8-875d-9c4eccb6ad84" xlink:href="lpx-20210930.xsd#lpx_SidingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c2191869-c185-426b-9022-7ec28b889456" xlink:to="loc_lpx_SidingMember_6fd6af17-dd00-40f8-875d-9c4eccb6ad84" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_OsbMember_af53becb-3a1b-49b3-9d67-cba0d560a45a" xlink:href="lpx-20210930.xsd#lpx_OsbMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c2191869-c185-426b-9022-7ec28b889456" xlink:to="loc_lpx_OsbMember_af53becb-3a1b-49b3-9d67-cba0d560a45a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_EWPMember_276d2960-ccde-4f3d-b182-50eafbfcbc5c" xlink:href="lpx-20210930.xsd#lpx_EWPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c2191869-c185-426b-9022-7ec28b889456" xlink:to="loc_lpx_EWPMember_276d2960-ccde-4f3d-b182-50eafbfcbc5c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_fd08ce76-4f1a-45cd-875e-2a812a98b900" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c2191869-c185-426b-9022-7ec28b889456" xlink:to="loc_us-gaap_AllOtherSegmentsMember_fd08ce76-4f1a-45cd-875e-2a812a98b900" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_LPSouthAmericaMember_c9f48d85-e794-4b95-88e7-ec6fde5cf5e7" xlink:href="lpx-20210930.xsd#lpx_LPSouthAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c2191869-c185-426b-9022-7ec28b889456" xlink:to="loc_lpx_LPSouthAmericaMember_c9f48d85-e794-4b95-88e7-ec6fde5cf5e7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_IntersegmentMember_0a47a18e-a582-46cc-81f1-00b297099aa6" xlink:href="lpx-20210930.xsd#lpx_IntersegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c2191869-c185-426b-9022-7ec28b889456" xlink:to="loc_lpx_IntersegmentMember_0a47a18e-a582-46cc-81f1-00b297099aa6" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/EarningsperShareDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#EarningsperShareDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/EarningsperShareDetails" xlink:type="extended" id="i133bb80fd6464c60a239369a7ed6e527_EarningsperShareDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDilutedLineItems_06322928-e420-4ab9-9df4-4dc60fb946ea" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareDilutedLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_dad7373c-9883-4abd-97ad-d7d011fef6b8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_06322928-e420-4ab9-9df4-4dc60fb946ea" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_dad7373c-9883-4abd-97ad-d7d011fef6b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_f2ce4157-2531-4f88-982a-02bd9192789d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_06322928-e420-4ab9-9df4-4dc60fb946ea" xlink:to="loc_us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements_f2ce4157-2531-4f88-982a-02bd9192789d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_d6818448-7362-42c4-8fa3-81ddbdb8d847" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_06322928-e420-4ab9-9df4-4dc60fb946ea" xlink:to="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_d6818448-7362-42c4-8fa3-81ddbdb8d847" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareBasic_596f2ddc-9345-4a5d-9160-105c84aaacff" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareBasic"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_06322928-e420-4ab9-9df4-4dc60fb946ea" xlink:to="loc_us-gaap_EarningsPerShareBasic_596f2ddc-9345-4a5d-9160-105c84aaacff" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarningsPerShareDiluted_bf900130-0068-4a1e-943c-b9bcde897cb4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EarningsPerShareDiluted"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_06322928-e420-4ab9-9df4-4dc60fb946ea" xlink:to="loc_us-gaap_EarningsPerShareDiluted_bf900130-0068-4a1e-943c-b9bcde897cb4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTable_12122890-9cb3-43ad-92c6-60ddd6e545ed" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EarningsPerShareDilutedLineItems_06322928-e420-4ab9-9df4-4dc60fb946ea" xlink:to="loc_us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTable_12122890-9cb3-43ad-92c6-60ddd6e545ed" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_65140c31-4dab-4132-9971-6e2d65acef7b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfEarningsPerShareDilutedByCommonClassTable_12122890-9cb3-43ad-92c6-60ddd6e545ed" xlink:to="loc_us-gaap_StatementClassOfStockAxis_65140c31-4dab-4132-9971-6e2d65acef7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_65140c31-4dab-4132-9971-6e2d65acef7b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_65140c31-4dab-4132-9971-6e2d65acef7b" xlink:to="loc_us-gaap_ClassOfStockDomain_65140c31-4dab-4132-9971-6e2d65acef7b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_fc5aca80-8551-4410-8399-2f93fb9efbd9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_65140c31-4dab-4132-9971-6e2d65acef7b" xlink:to="loc_us-gaap_ClassOfStockDomain_fc5aca80-8551-4410-8399-2f93fb9efbd9" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/FairValueMeasurementsDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#FairValueMeasurementsDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/FairValueMeasurementsDetails" xlink:type="extended" id="i78e4df03f199442da41727a45322e8d9_FairValueMeasurementsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_c4d0fe6f-5405-485a-b92d-fc41cde31c4e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_a23d1902-4bf4-41f3-bc8f-3ff6d8f6306f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_c4d0fe6f-5405-485a-b92d-fc41cde31c4e" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_a23d1902-4bf4-41f3-bc8f-3ff6d8f6306f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_40f334d7-d392-47a8-b1bc-86175ba5dc53" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_c4d0fe6f-5405-485a-b92d-fc41cde31c4e" xlink:to="loc_us-gaap_LongTermDebtFairValue_40f334d7-d392-47a8-b1bc-86175ba5dc53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c9ac6584-87ba-4f7c-9336-7a3f5ae16105" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_c4d0fe6f-5405-485a-b92d-fc41cde31c4e" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c9ac6584-87ba-4f7c-9336-7a3f5ae16105" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_199e430b-8801-475e-b146-183cdc1b451e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c9ac6584-87ba-4f7c-9336-7a3f5ae16105" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_199e430b-8801-475e-b146-183cdc1b451e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_199e430b-8801-475e-b146-183cdc1b451e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_199e430b-8801-475e-b146-183cdc1b451e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_199e430b-8801-475e-b146-183cdc1b451e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_6be1c5cb-3eee-43e0-9487-b4c1bb03b5f1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_199e430b-8801-475e-b146-183cdc1b451e" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_6be1c5cb-3eee-43e0-9487-b4c1bb03b5f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_SeniorUnsecuredNotesMaturing2029Member_6a07b5fc-2cd1-43e9-a13e-7386d51b0f0b" xlink:href="lpx-20210930.xsd#lpx_SeniorUnsecuredNotesMaturing2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_6be1c5cb-3eee-43e0-9487-b4c1bb03b5f1" xlink:to="loc_lpx_SeniorUnsecuredNotesMaturing2029Member_6a07b5fc-2cd1-43e9-a13e-7386d51b0f0b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_9f7b2234-3ed3-4973-87b9-d43926a49264" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c9ac6584-87ba-4f7c-9336-7a3f5ae16105" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_9f7b2234-3ed3-4973-87b9-d43926a49264" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9f7b2234-3ed3-4973-87b9-d43926a49264_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_9f7b2234-3ed3-4973-87b9-d43926a49264" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_9f7b2234-3ed3-4973-87b9-d43926a49264_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3d95c69a-f522-4e27-8eb4-0cc00b1155a7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_9f7b2234-3ed3-4973-87b9-d43926a49264" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3d95c69a-f522-4e27-8eb4-0cc00b1155a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_7d4fdebf-2370-473c-a461-660cc62cabfc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_c9ac6584-87ba-4f7c-9336-7a3f5ae16105" xlink:to="loc_us-gaap_FinancialInstrumentAxis_7d4fdebf-2370-473c-a461-660cc62cabfc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7d4fdebf-2370-473c-a461-660cc62cabfc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_7d4fdebf-2370-473c-a461-660cc62cabfc" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7d4fdebf-2370-473c-a461-660cc62cabfc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_d1598b17-b144-4ac2-b0e0-3f2af667845f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_7d4fdebf-2370-473c-a461-660cc62cabfc" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_d1598b17-b144-4ac2-b0e0-3f2af667845f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_TradingSecuritiesMember_2adb4f52-f22d-417d-bfcd-04860c86be0d" xlink:href="lpx-20210930.xsd#lpx_TradingSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_d1598b17-b144-4ac2-b0e0-3f2af667845f" xlink:to="loc_lpx_TradingSecuritiesMember_2adb4f52-f22d-417d-bfcd-04860c86be0d" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/InventoriesDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#InventoriesDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/InventoriesDetails" xlink:type="extended" id="i0e093a97611e4b079acde6906bc03eaa_InventoriesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryLineItems_ab6e0588-6718-4e80-aba9-d982b3317ca1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_Logs_abaf5c94-3a06-479e-97a0-afe1318b463d" xlink:href="lpx-20210930.xsd#lpx_Logs"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_ab6e0588-6718-4e80-aba9-d982b3317ca1" xlink:to="loc_lpx_Logs_abaf5c94-3a06-479e-97a0-afe1318b463d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_c2f39c66-9cdd-41f9-b33f-d58f67841f56" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryRawMaterialsNetOfReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_ab6e0588-6718-4e80-aba9-d982b3317ca1" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_c2f39c66-9cdd-41f9-b33f-d58f67841f56" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_a08ef7f1-9ba8-468d-8661-bce0a2a73369" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryWorkInProcessNetOfReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_ab6e0588-6718-4e80-aba9-d982b3317ca1" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_a08ef7f1-9ba8-468d-8661-bce0a2a73369" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_833e95ba-0978-4890-8329-736bd1345bad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_ab6e0588-6718-4e80-aba9-d982b3317ca1" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_833e95ba-0978-4890-8329-736bd1345bad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_cc1956a2-5333-4e82-a240-d7274b055913" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InventoryLineItems_ab6e0588-6718-4e80-aba9-d982b3317ca1" xlink:to="loc_us-gaap_InventoryNet_cc1956a2-5333-4e82-a240-d7274b055913" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryCurrentTable_2bdba985-b2dc-4f45-b3de-43d0984439c8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InventoryCurrentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_InventoryLineItems_ab6e0588-6718-4e80-aba9-d982b3317ca1" xlink:to="loc_us-gaap_InventoryCurrentTable_2bdba985-b2dc-4f45-b3de-43d0984439c8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryAxis_62a198b6-b4d8-4c5e-8c4b-6037a6082127" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PublicUtilitiesInventoryAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_InventoryCurrentTable_2bdba985-b2dc-4f45-b3de-43d0984439c8" xlink:to="loc_us-gaap_PublicUtilitiesInventoryAxis_62a198b6-b4d8-4c5e-8c4b-6037a6082127" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_62a198b6-b4d8-4c5e-8c4b-6037a6082127_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_62a198b6-b4d8-4c5e-8c4b-6037a6082127" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_62a198b6-b4d8-4c5e-8c4b-6037a6082127_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_2341ccf4-7c17-4baf-8065-230668edae84" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PublicUtilitiesInventoryTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PublicUtilitiesInventoryAxis_62a198b6-b4d8-4c5e-8c4b-6037a6082127" xlink:to="loc_us-gaap_PublicUtilitiesInventoryTypeDomain_2341ccf4-7c17-4baf-8065-230668edae84" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/GoodwillandOtherIntangibleAssetsTables" xlink:type="simple" xlink:href="lpx-20210930.xsd#GoodwillandOtherIntangibleAssetsTables"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/GoodwillandOtherIntangibleAssetsTables" xlink:type="extended" id="i3559c779803a4a0ea75be25e5b08012a_GoodwillandOtherIntangibleAssetsTables">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_851f7fd4-8441-4408-a971-7070811b16c8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock_37cc2b92-44a3-4537-815a-6636609672d6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_851f7fd4-8441-4408-a971-7070811b16c8" xlink:to="loc_us-gaap_ScheduleOfIntangibleAssetsAndGoodwillTableTextBlock_37cc2b92-44a3-4537-815a-6636609672d6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_242bb665-bac2-4e18-8bb3-ba5f27b313e2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_851f7fd4-8441-4408-a971-7070811b16c8" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_242bb665-bac2-4e18-8bb3-ba5f27b313e2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_edebe82b-e8c4-425d-b3e8-9a5ed9731b46" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_242bb665-bac2-4e18-8bb3-ba5f27b313e2" xlink:to="loc_srt_ConsolidationItemsAxis_edebe82b-e8c4-425d-b3e8-9a5ed9731b46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_edebe82b-e8c4-425d-b3e8-9a5ed9731b46_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_edebe82b-e8c4-425d-b3e8-9a5ed9731b46" xlink:to="loc_srt_ConsolidationItemsDomain_edebe82b-e8c4-425d-b3e8-9a5ed9731b46_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_f3c0babe-51f1-4e6d-a1d8-72c311707ecb" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_edebe82b-e8c4-425d-b3e8-9a5ed9731b46" xlink:to="loc_srt_ConsolidationItemsDomain_f3c0babe-51f1-4e6d-a1d8-72c311707ecb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_acb7c877-f55b-4e67-9562-85602831fcd6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_242bb665-bac2-4e18-8bb3-ba5f27b313e2" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_acb7c877-f55b-4e67-9562-85602831fcd6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_acb7c877-f55b-4e67-9562-85602831fcd6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_acb7c877-f55b-4e67-9562-85602831fcd6" xlink:to="loc_us-gaap_SegmentDomain_acb7c877-f55b-4e67-9562-85602831fcd6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_b156597d-7bbc-43bb-a2ed-34995930a7fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_acb7c877-f55b-4e67-9562-85602831fcd6" xlink:to="loc_us-gaap_SegmentDomain_b156597d-7bbc-43bb-a2ed-34995930a7fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_46423883-8bf1-4b4c-ae16-a284a97d82c1" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_242bb665-bac2-4e18-8bb3-ba5f27b313e2" xlink:to="loc_srt_RangeAxis_46423883-8bf1-4b4c-ae16-a284a97d82c1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_46423883-8bf1-4b4c-ae16-a284a97d82c1_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_46423883-8bf1-4b4c-ae16-a284a97d82c1" xlink:to="loc_srt_RangeMember_46423883-8bf1-4b4c-ae16-a284a97d82c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_e76e6a9d-9691-4f75-af4c-ac05856425d9" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_46423883-8bf1-4b4c-ae16-a284a97d82c1" xlink:to="loc_srt_RangeMember_e76e6a9d-9691-4f75-af4c-ac05856425d9" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/GoodwillandOtherIntangibleAssetsDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#GoodwillandOtherIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/GoodwillandOtherIntangibleAssetsDetails" xlink:type="extended" id="i3a301d51ecc64dd2abc02ff4f1c4860a_GoodwillandOtherIntangibleAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_5ce89334-0553-4c9e-9302-d1da28002808" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TimberAndTimberlands_2d0bb6a5-8dab-42fc-bc4f-0b8528f5a37f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TimberAndTimberlands"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_5ce89334-0553-4c9e-9302-d1da28002808" xlink:to="loc_us-gaap_TimberAndTimberlands_2d0bb6a5-8dab-42fc-bc4f-0b8528f5a37f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_f44c961a-b393-4040-974d-55f08f0d4ee9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_5ce89334-0553-4c9e-9302-d1da28002808" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_f44c961a-b393-4040-974d-55f08f0d4ee9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_706b3f06-e12f-412d-b1e2-655030bf2dfb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_5ce89334-0553-4c9e-9302-d1da28002808" xlink:to="loc_us-gaap_Goodwill_706b3f06-e12f-412d-b1e2-655030bf2dfb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_748af40d-5319-46fb-aff4-53d5e1d7c1bb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_5ce89334-0553-4c9e-9302-d1da28002808" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_748af40d-5319-46fb-aff4-53d5e1d7c1bb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_ba9ec474-6a1c-4cfe-98b3-3483c5291718" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_5ce89334-0553-4c9e-9302-d1da28002808" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_ba9ec474-6a1c-4cfe-98b3-3483c5291718" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_df0659ed-2a3b-4a4f-a843-5c43561eec42" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_ba9ec474-6a1c-4cfe-98b3-3483c5291718" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_df0659ed-2a3b-4a4f-a843-5c43561eec42" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_df0659ed-2a3b-4a4f-a843-5c43561eec42_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_df0659ed-2a3b-4a4f-a843-5c43561eec42" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_df0659ed-2a3b-4a4f-a843-5c43561eec42_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e83ef6b1-39bc-40bb-9454-468e919c1522" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_df0659ed-2a3b-4a4f-a843-5c43561eec42" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e83ef6b1-39bc-40bb-9454-468e919c1522" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductiveLandMember_94e9bab1-00a7-414e-9e35-5991ddfa372f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductiveLandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e83ef6b1-39bc-40bb-9454-468e919c1522" xlink:to="loc_us-gaap_ProductiveLandMember_94e9bab1-00a7-414e-9e35-5991ddfa372f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DevelopedTechnologyRightsMember_5aa0274b-4239-4727-bfd7-3672010f9489" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DevelopedTechnologyRightsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e83ef6b1-39bc-40bb-9454-468e919c1522" xlink:to="loc_us-gaap_DevelopedTechnologyRightsMember_5aa0274b-4239-4727-bfd7-3672010f9489" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsMember_619e853a-5f4d-4288-b87f-1b142fa74827" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherIntangibleAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_e83ef6b1-39bc-40bb-9454-468e919c1522" xlink:to="loc_us-gaap_OtherIntangibleAssetsMember_619e853a-5f4d-4288-b87f-1b142fa74827" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/LongTermDebtSummaryofDebtOutstandingDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#LongTermDebtSummaryofDebtOutstandingDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/LongTermDebtSummaryofDebtOutstandingDetails" xlink:type="extended" id="i908a64bebb444e9991e470eeb485ed16_LongTermDebtSummaryofDebtOutstandingDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_c1f7f200-1bc9-499e-9255-c9b212fc153c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_dbc4e6d9-9d4b-43c9-8796-51e6f3c46efc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_c1f7f200-1bc9-499e-9255-c9b212fc153c" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_dbc4e6d9-9d4b-43c9-8796-51e6f3c46efc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinanceLeaseLiability_dfa931ac-6a44-4ada-8f39-0b4fcd9aab75" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_FinanceLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_c1f7f200-1bc9-499e-9255-c9b212fc153c" xlink:to="loc_us-gaap_FinanceLeaseLiability_dfa931ac-6a44-4ada-8f39-0b4fcd9aab75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_2607be99-4726-4674-9e57-14e4cae4721a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_c1f7f200-1bc9-499e-9255-c9b212fc153c" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_2607be99-4726-4674-9e57-14e4cae4721a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_191b7d8e-49c8-4594-bf6d-fb386aeeb1f9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_c1f7f200-1bc9-499e-9255-c9b212fc153c" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsIncludingCurrentMaturities_191b7d8e-49c8-4594-bf6d-fb386aeeb1f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_22a7a142-d2a6-423c-a15d-d152419a296d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_c1f7f200-1bc9-499e-9255-c9b212fc153c" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligationsCurrent_22a7a142-d2a6-423c-a15d-d152419a296d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_13c66e5a-5e92-4f13-af54-71988077a848" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtAndCapitalLeaseObligations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_c1f7f200-1bc9-499e-9255-c9b212fc153c" xlink:to="loc_us-gaap_LongTermDebtAndCapitalLeaseObligations_13c66e5a-5e92-4f13-af54-71988077a848" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_66def685-515a-4f34-85af-94f29e7f835e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_c1f7f200-1bc9-499e-9255-c9b212fc153c" xlink:to="loc_us-gaap_DebtInstrumentTable_66def685-515a-4f34-85af-94f29e7f835e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_18eb58b3-f216-4c35-bd0b-8e37aa5d1a9d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_66def685-515a-4f34-85af-94f29e7f835e" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_18eb58b3-f216-4c35-bd0b-8e37aa5d1a9d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_18eb58b3-f216-4c35-bd0b-8e37aa5d1a9d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_18eb58b3-f216-4c35-bd0b-8e37aa5d1a9d" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_18eb58b3-f216-4c35-bd0b-8e37aa5d1a9d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_8bad25c2-10ea-4c13-9d4e-b5c7c03ba80b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_18eb58b3-f216-4c35-bd0b-8e37aa5d1a9d" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_8bad25c2-10ea-4c13-9d4e-b5c7c03ba80b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_c39efafc-3836-415a-ab0f-7a9e704a1ce2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_8bad25c2-10ea-4c13-9d4e-b5c7c03ba80b" xlink:to="loc_us-gaap_SeniorNotesMember_c39efafc-3836-415a-ab0f-7a9e704a1ce2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_2589bdba-f32b-4f12-8d55-61405de9ae1e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_8bad25c2-10ea-4c13-9d4e-b5c7c03ba80b" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_2589bdba-f32b-4f12-8d55-61405de9ae1e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_518ab0b0-1204-4a16-b90c-4b3a96f04f7c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_66def685-515a-4f34-85af-94f29e7f835e" xlink:to="loc_us-gaap_DebtInstrumentAxis_518ab0b0-1204-4a16-b90c-4b3a96f04f7c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_518ab0b0-1204-4a16-b90c-4b3a96f04f7c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_518ab0b0-1204-4a16-b90c-4b3a96f04f7c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_518ab0b0-1204-4a16-b90c-4b3a96f04f7c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_c60a9b5f-acb6-47a0-9e16-3dcdf555667d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_518ab0b0-1204-4a16-b90c-4b3a96f04f7c" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_c60a9b5f-acb6-47a0-9e16-3dcdf555667d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_Seniorunsecurednotesmaturing2024Member_c67fd0b9-f4d4-40bd-927d-623447f44e11" xlink:href="lpx-20210930.xsd#lpx_Seniorunsecurednotesmaturing2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c60a9b5f-acb6-47a0-9e16-3dcdf555667d" xlink:to="loc_lpx_Seniorunsecurednotesmaturing2024Member_c67fd0b9-f4d4-40bd-927d-623447f44e11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_SeniorUnsecuredNotesMaturing2029Member_6c77dc7a-f104-4eff-8ba6-99ac9ad7da44" xlink:href="lpx-20210930.xsd#lpx_SeniorUnsecuredNotesMaturing2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_c60a9b5f-acb6-47a0-9e16-3dcdf555667d" xlink:to="loc_lpx_SeniorUnsecuredNotesMaturing2029Member_6c77dc7a-f104-4eff-8ba6-99ac9ad7da44" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/LongTermDebtNarrativeDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#LongTermDebtNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/LongTermDebtNarrativeDetails" xlink:type="extended" id="i6473a55ddfeb4880a1bb62845739104e_LongTermDebtNarrativeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_6343a162-735e-4728-9193-92f53f40d9bc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_6343a162-735e-4728-9193-92f53f40d9bc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_ed12d87e-4526-4554-a722-6d1470fade1f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_ed12d87e-4526-4554-a722-6d1470fade1f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_652d42fb-7913-4b95-927d-4130a62decde" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityInterestRateDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_LineOfCreditFacilityInterestRateDuringPeriod_652d42fb-7913-4b95-927d-4130a62decde" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_0f8cd91d-e829-4a65-a61c-3e0436d63c9c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_0f8cd91d-e829-4a65-a61c-3e0436d63c9c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_CapitalizationRatioMaximum_abe65cd4-be4d-48fb-bc3a-6c109f1cd118" xlink:href="lpx-20210930.xsd#lpx_CapitalizationRatioMaximum"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_lpx_CapitalizationRatioMaximum_abe65cd4-be4d-48fb-bc3a-6c109f1cd118" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_DebtCovenantConsolidatedNetWorth_81239c84-c127-4468-85e5-27c0828b48e3" xlink:href="lpx-20210930.xsd#lpx_DebtCovenantConsolidatedNetWorth"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_lpx_DebtCovenantConsolidatedNetWorth_81239c84-c127-4468-85e5-27c0828b48e3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_DebtCovenantConsolidatedNetWorthAddOnForConsolidatedNetIncomeAfterDeductionsPercent_6816d459-8858-4e48-b3e9-5508e4e78e14" xlink:href="lpx-20210930.xsd#lpx_DebtCovenantConsolidatedNetWorthAddOnForConsolidatedNetIncomeAfterDeductionsPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_lpx_DebtCovenantConsolidatedNetWorthAddOnForConsolidatedNetIncomeAfterDeductionsPercent_6816d459-8858-4e48-b3e9-5508e4e78e14" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_53eab417-36d6-4bb6-b28c-1f1dac5f6d02" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_53eab417-36d6-4bb6-b28c-1f1dac5f6d02" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebtFairValue_1240aa41-9903-4445-a6e6-f318e4f3c0a2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongTermDebtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_LongTermDebtFairValue_1240aa41-9903-4445-a6e6-f318e4f3c0a2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ccbbdaf3-870c-4e34-8d37-27090d883838" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_ccbbdaf3-870c-4e34-8d37-27090d883838" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RedemptionPremium_48dd69d1-33b9-45b6-b891-eee7dbaa5d70" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RedemptionPremium"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_RedemptionPremium_48dd69d1-33b9-45b6-b891-eee7dbaa5d70" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_ea4590bb-f4e3-408d-a211-8f1291c5d81f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_WriteOffOfDeferredDebtIssuanceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_WriteOffOfDeferredDebtIssuanceCost_ea4590bb-f4e3-408d-a211-8f1291c5d81f" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_68cc3445-2c79-4e15-9d00-eb9a84bfad6f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentRedemptionPricePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_DebtInstrumentRedemptionPricePercentage_68cc3445-2c79-4e15-9d00-eb9a84bfad6f" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_77fbf7cd-a8fb-4dde-b37e-63ca18738526" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_77fbf7cd-a8fb-4dde-b37e-63ca18738526" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_042842f7-82ef-45c3-9e4c-fa8aa6c22633" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_9c5f1a85-9629-4a7a-84b8-5c19edc4b7f3" xlink:to="loc_us-gaap_DebtInstrumentTable_042842f7-82ef-45c3-9e4c-fa8aa6c22633" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_a5607c97-6348-4b31-88ac-06bc53f9b574" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_042842f7-82ef-45c3-9e4c-fa8aa6c22633" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_a5607c97-6348-4b31-88ac-06bc53f9b574" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_a5607c97-6348-4b31-88ac-06bc53f9b574_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_a5607c97-6348-4b31-88ac-06bc53f9b574" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_a5607c97-6348-4b31-88ac-06bc53f9b574_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_72d5efa8-4e08-462e-a0cd-aaf276bbf535" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_a5607c97-6348-4b31-88ac-06bc53f9b574" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_72d5efa8-4e08-462e-a0cd-aaf276bbf535" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_034b3678-a8f8-4093-a2bc-3096c39bdc41" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_72d5efa8-4e08-462e-a0cd-aaf276bbf535" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_034b3678-a8f8-4093-a2bc-3096c39bdc41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_AmendedCreditFacilityALoanMember_80e59c50-3307-4f6e-91e7-33e3affeb5a4" xlink:href="lpx-20210930.xsd#lpx_AmendedCreditFacilityALoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_72d5efa8-4e08-462e-a0cd-aaf276bbf535" xlink:to="loc_lpx_AmendedCreditFacilityALoanMember_80e59c50-3307-4f6e-91e7-33e3affeb5a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_ecb52760-d496-4ec0-8623-f08ff5e8c065" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_72d5efa8-4e08-462e-a0cd-aaf276bbf535" xlink:to="loc_us-gaap_SeniorNotesMember_ecb52760-d496-4ec0-8623-f08ff5e8c065" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_ca15c175-321e-4019-92cd-f67b8a2bf8c8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_042842f7-82ef-45c3-9e4c-fa8aa6c22633" xlink:to="loc_us-gaap_DebtInstrumentAxis_ca15c175-321e-4019-92cd-f67b8a2bf8c8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_ca15c175-321e-4019-92cd-f67b8a2bf8c8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_ca15c175-321e-4019-92cd-f67b8a2bf8c8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_ca15c175-321e-4019-92cd-f67b8a2bf8c8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_78fa68af-20d7-4bf7-a608-dc56c798adc0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_ca15c175-321e-4019-92cd-f67b8a2bf8c8" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_78fa68af-20d7-4bf7-a608-dc56c798adc0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_AmendedCreditFacilityBLoanMember_6c6b301c-5498-4e76-83bf-c663dee6bfce" xlink:href="lpx-20210930.xsd#lpx_AmendedCreditFacilityBLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_78fa68af-20d7-4bf7-a608-dc56c798adc0" xlink:to="loc_lpx_AmendedCreditFacilityBLoanMember_6c6b301c-5498-4e76-83bf-c663dee6bfce" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_AmendedCreditFacilityALoanMember_e04d21be-9c81-47a4-a144-95f3e0b77d4b" xlink:href="lpx-20210930.xsd#lpx_AmendedCreditFacilityALoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_78fa68af-20d7-4bf7-a608-dc56c798adc0" xlink:to="loc_lpx_AmendedCreditFacilityALoanMember_e04d21be-9c81-47a4-a144-95f3e0b77d4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_Seniorunsecurednotesmaturing2024Member_d664fc33-0c51-42c8-a711-eb76a6628dd4" xlink:href="lpx-20210930.xsd#lpx_Seniorunsecurednotesmaturing2024Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_78fa68af-20d7-4bf7-a608-dc56c798adc0" xlink:to="loc_lpx_Seniorunsecurednotesmaturing2024Member_d664fc33-0c51-42c8-a711-eb76a6628dd4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_SeniorUnsecuredNotesMaturing2029Member_a05e1d24-1633-4978-9f70-9825d8da4bf2" xlink:href="lpx-20210930.xsd#lpx_SeniorUnsecuredNotesMaturing2029Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_78fa68af-20d7-4bf7-a608-dc56c798adc0" xlink:to="loc_lpx_SeniorUnsecuredNotesMaturing2029Member_a05e1d24-1633-4978-9f70-9825d8da4bf2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_304c83d6-bc22-49ed-b31e-e25656f53176" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_042842f7-82ef-45c3-9e4c-fa8aa6c22633" xlink:to="loc_us-gaap_VariableRateAxis_304c83d6-bc22-49ed-b31e-e25656f53176" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_304c83d6-bc22-49ed-b31e-e25656f53176_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_304c83d6-bc22-49ed-b31e-e25656f53176" xlink:to="loc_us-gaap_VariableRateDomain_304c83d6-bc22-49ed-b31e-e25656f53176_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_b36a7b63-12d7-4658-9a02-9e65280b7ec4" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_304c83d6-bc22-49ed-b31e-e25656f53176" xlink:to="loc_us-gaap_VariableRateDomain_b36a7b63-12d7-4658-9a02-9e65280b7ec4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BaseRateMember_dffa89d0-b109-40b3-9974-904ae91a0f38" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_BaseRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_b36a7b63-12d7-4658-9a02-9e65280b7ec4" xlink:to="loc_us-gaap_BaseRateMember_dffa89d0-b109-40b3-9974-904ae91a0f38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_5819bb46-c855-41d1-96d1-aa57e1c5a0df" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LondonInterbankOfferedRateLIBORMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_b36a7b63-12d7-4658-9a02-9e65280b7ec4" xlink:to="loc_us-gaap_LondonInterbankOfferedRateLIBORMember_5819bb46-c855-41d1-96d1-aa57e1c5a0df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_a388cde8-0d22-4950-b943-b2d719375e7c" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_042842f7-82ef-45c3-9e4c-fa8aa6c22633" xlink:to="loc_srt_RangeAxis_a388cde8-0d22-4950-b943-b2d719375e7c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a388cde8-0d22-4950-b943-b2d719375e7c_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_a388cde8-0d22-4950-b943-b2d719375e7c" xlink:to="loc_srt_RangeMember_a388cde8-0d22-4950-b943-b2d719375e7c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_78864c20-b874-4a43-a55b-64e3f9992361" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_a388cde8-0d22-4950-b943-b2d719375e7c" xlink:to="loc_srt_RangeMember_78864c20-b874-4a43-a55b-64e3f9992361" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_44d1c5a5-e8a2-45de-a981-f71078687222" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_78864c20-b874-4a43-a55b-64e3f9992361" xlink:to="loc_srt_MinimumMember_44d1c5a5-e8a2-45de-a981-f71078687222" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d2edaa26-6e94-467b-a464-5ffc85270be4" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_78864c20-b874-4a43-a55b-64e3f9992361" xlink:to="loc_srt_MaximumMember_d2edaa26-6e94-467b-a464-5ffc85270be4" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/IncomeTaxesDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#IncomeTaxesDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/IncomeTaxesDetails" xlink:type="extended" id="ic3cf1b1cef454aae81881aa67a3f0030_IncomeTaxesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_edaba7bb-fdf3-44b0-bdce-1b99ac330e04" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_b8d2eba4-a415-4f12-9b18-7f14d28aa476" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_edaba7bb-fdf3-44b0-bdce-1b99ac330e04" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_b8d2eba4-a415-4f12-9b18-7f14d28aa476" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherTaxExpenseBenefit_11e7230d-2613-4f25-974d-b0439d26b41b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_edaba7bb-fdf3-44b0-bdce-1b99ac330e04" xlink:to="loc_us-gaap_OtherTaxExpenseBenefit_11e7230d-2613-4f25-974d-b0439d26b41b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_EstimatedAnnualTaxRate_aefae866-7551-4e17-aa1d-7ac1352517c1" xlink:href="lpx-20210930.xsd#lpx_EstimatedAnnualTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_edaba7bb-fdf3-44b0-bdce-1b99ac330e04" xlink:to="loc_lpx_EstimatedAnnualTaxRate_aefae866-7551-4e17-aa1d-7ac1352517c1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_aceed958-cc69-43f7-9204-6401348a940e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_edaba7bb-fdf3-44b0-bdce-1b99ac330e04" xlink:to="loc_us-gaap_StatementTable_aceed958-cc69-43f7-9204-6401348a940e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_b72f2d0d-4051-478a-9636-dda25bfa804f" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_aceed958-cc69-43f7-9204-6401348a940e" xlink:to="loc_srt_StatementScenarioAxis_b72f2d0d-4051-478a-9636-dda25bfa804f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_b72f2d0d-4051-478a-9636-dda25bfa804f_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_b72f2d0d-4051-478a-9636-dda25bfa804f" xlink:to="loc_srt_ScenarioUnspecifiedDomain_b72f2d0d-4051-478a-9636-dda25bfa804f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_eb94318c-66c2-4669-a3e8-f0b32dfe1b07" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_b72f2d0d-4051-478a-9636-dda25bfa804f" xlink:to="loc_srt_ScenarioUnspecifiedDomain_eb94318c-66c2-4669-a3e8-f0b32dfe1b07" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_3727ca10-bb16-48b2-8391-63057018da27" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_eb94318c-66c2-4669-a3e8-f0b32dfe1b07" xlink:to="loc_srt_ScenarioForecastMember_3727ca10-bb16-48b2-8391-63057018da27" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/CompensationRelatedCostsShareBasedPaymentsDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#CompensationRelatedCostsShareBasedPaymentsDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/CompensationRelatedCostsShareBasedPaymentsDetails" xlink:type="extended" id="id70089aafd4b4c1f8c63ca1eb934d196_CompensationRelatedCostsShareBasedPaymentsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_689ace7f-4496-4ec4-9ff5-bcd51be9dd6e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSellingGeneralAndAdministrativeExpense_f3afe775-e773-45c9-83da-fb6009b5907f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherSellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_689ace7f-4496-4ec4-9ff5-bcd51be9dd6e" xlink:to="loc_us-gaap_OtherSellingGeneralAndAdministrativeExpense_f3afe775-e773-45c9-83da-fb6009b5907f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_UnrecognizedStockCompensation_e5fe7388-2a90-4029-bd75-c00d1d75f14e" xlink:href="lpx-20210930.xsd#lpx_UnrecognizedStockCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_689ace7f-4496-4ec4-9ff5-bcd51be9dd6e" xlink:to="loc_lpx_UnrecognizedStockCompensation_e5fe7388-2a90-4029-bd75-c00d1d75f14e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_83bcbb04-ed45-4c7f-84db-dade2608cb5d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_689ace7f-4496-4ec4-9ff5-bcd51be9dd6e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesIssuedInPeriod_83bcbb04-ed45-4c7f-84db-dade2608cb5d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_18b287ac-ab1e-4c38-a060-2ef12279e7ad" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_689ace7f-4496-4ec4-9ff5-bcd51be9dd6e" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_18b287ac-ab1e-4c38-a060-2ef12279e7ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_404b42be-3e65-4b2f-b34e-30e312d9ed48" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_689ace7f-4496-4ec4-9ff5-bcd51be9dd6e" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_404b42be-3e65-4b2f-b34e-30e312d9ed48" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_8f3e26c1-4abc-41fe-bfdb-003f0cb185fb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_404b42be-3e65-4b2f-b34e-30e312d9ed48" xlink:to="loc_us-gaap_AwardTypeAxis_8f3e26c1-4abc-41fe-bfdb-003f0cb185fb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8f3e26c1-4abc-41fe-bfdb-003f0cb185fb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_8f3e26c1-4abc-41fe-bfdb-003f0cb185fb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_8f3e26c1-4abc-41fe-bfdb-003f0cb185fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_208ee077-2b5d-4a66-b3b1-6c335e09e81f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_8f3e26c1-4abc-41fe-bfdb-003f0cb185fb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_208ee077-2b5d-4a66-b3b1-6c335e09e81f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformanceSharesMember_f0d8e303-995f-44b4-8084-a5954a45ff4c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PerformanceSharesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_208ee077-2b5d-4a66-b3b1-6c335e09e81f" xlink:to="loc_us-gaap_PerformanceSharesMember_f0d8e303-995f-44b4-8084-a5954a45ff4c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_56aa4ad2-7ba5-43ff-aca8-bf4ada18a2d9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_404b42be-3e65-4b2f-b34e-30e312d9ed48" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_56aa4ad2-7ba5-43ff-aca8-bf4ada18a2d9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_56aa4ad2-7ba5-43ff-aca8-bf4ada18a2d9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_56aa4ad2-7ba5-43ff-aca8-bf4ada18a2d9" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_56aa4ad2-7ba5-43ff-aca8-bf4ada18a2d9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_75c972db-1b5f-4600-890d-c91bfb16e9dc" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_56aa4ad2-7ba5-43ff-aca8-bf4ada18a2d9" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_75c972db-1b5f-4600-890d-c91bfb16e9dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_7866fc8b-922d-492a-bcd3-96712e445bde" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_404b42be-3e65-4b2f-b34e-30e312d9ed48" xlink:to="loc_srt_RangeAxis_7866fc8b-922d-492a-bcd3-96712e445bde" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_7866fc8b-922d-492a-bcd3-96712e445bde_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_7866fc8b-922d-492a-bcd3-96712e445bde" xlink:to="loc_srt_RangeMember_7866fc8b-922d-492a-bcd3-96712e445bde_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_aa10b123-c68f-498f-9ff0-6348f562146d" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_7866fc8b-922d-492a-bcd3-96712e445bde" xlink:to="loc_srt_RangeMember_aa10b123-c68f-498f-9ff0-6348f562146d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_dfd8fa1e-6489-433b-bfb1-374d7597dfed" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_aa10b123-c68f-498f-9ff0-6348f562146d" xlink:to="loc_srt_MinimumMember_dfd8fa1e-6489-433b-bfb1-374d7597dfed" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_8e5e250c-fdac-421f-9dbf-d67682150459" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_aa10b123-c68f-498f-9ff0-6348f562146d" xlink:to="loc_srt_MaximumMember_8e5e250c-fdac-421f-9dbf-d67682150459" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/CommimentsandContingenciesCommimentsandContingenciesDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#CommimentsandContingenciesCommimentsandContingenciesDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/CommimentsandContingenciesCommimentsandContingenciesDetails" xlink:type="extended" id="i361eac61e0634498b860914052388a22_CommimentsandContingenciesCommimentsandContingenciesDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_a59ffe90-cc5c-4790-be7e-bd516d1f77dd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualAtCarryingValue_6b70f85b-44b2-49aa-b92c-c8ce9cfbe59f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyAccrualAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_a59ffe90-cc5c-4790-be7e-bd516d1f77dd" xlink:to="loc_us-gaap_LossContingencyAccrualAtCarryingValue_6b70f85b-44b2-49aa-b92c-c8ce9cfbe59f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccrualForEnvironmentalLossContingenciesGross_cce21180-2167-4481-b768-58038288b66c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccrualForEnvironmentalLossContingenciesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_a59ffe90-cc5c-4790-be7e-bd516d1f77dd" xlink:to="loc_us-gaap_AccrualForEnvironmentalLossContingenciesGross_cce21180-2167-4481-b768-58038288b66c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualCarryingValueCurrent_b22f039f-1fb2-472a-86d1-61cc99f07173" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyAccrualCarryingValueCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_a59ffe90-cc5c-4790-be7e-bd516d1f77dd" xlink:to="loc_us-gaap_LossContingencyAccrualCarryingValueCurrent_b22f039f-1fb2-472a-86d1-61cc99f07173" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualCarryingValueNoncurrent_5bedc412-f8ce-4302-8119-6df4a192133f" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyAccrualCarryingValueNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_a59ffe90-cc5c-4790-be7e-bd516d1f77dd" xlink:to="loc_us-gaap_LossContingencyAccrualCarryingValueNoncurrent_5bedc412-f8ce-4302-8119-6df4a192133f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_533efa71-c25a-4c6e-819d-1c8bb276e8be" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_a59ffe90-cc5c-4790-be7e-bd516d1f77dd" xlink:to="loc_us-gaap_LossContingenciesTable_533efa71-c25a-4c6e-819d-1c8bb276e8be" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_fae5034f-06ca-4a86-9ee6-69dc917baee1" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_533efa71-c25a-4c6e-819d-1c8bb276e8be" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_fae5034f-06ca-4a86-9ee6-69dc917baee1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_fae5034f-06ca-4a86-9ee6-69dc917baee1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_fae5034f-06ca-4a86-9ee6-69dc917baee1" xlink:to="loc_us-gaap_LossContingencyNatureDomain_fae5034f-06ca-4a86-9ee6-69dc917baee1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_72d1ce0d-4d39-44bb-8a73-909abdcec961" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_fae5034f-06ca-4a86-9ee6-69dc917baee1" xlink:to="loc_us-gaap_LossContingencyNatureDomain_72d1ce0d-4d39-44bb-8a73-909abdcec961" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReserveForEnvironmentalCostsMember_a266cc66-859d-4806-b914-eb2b3e9454bb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReserveForEnvironmentalCostsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_72d1ce0d-4d39-44bb-8a73-909abdcec961" xlink:to="loc_us-gaap_ReserveForEnvironmentalCostsMember_a266cc66-859d-4806-b914-eb2b3e9454bb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_HardboardSidingReservesMember_a9bcf048-249f-4921-8165-a68652b12f72" xlink:href="lpx-20210930.xsd#lpx_HardboardSidingReservesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_72d1ce0d-4d39-44bb-8a73-909abdcec961" xlink:to="loc_lpx_HardboardSidingReservesMember_a9bcf048-249f-4921-8165-a68652b12f72" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/ImpairmentsofLongLivedAssetsImpairmentsofLongLivedAssetsDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#ImpairmentsofLongLivedAssetsImpairmentsofLongLivedAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/ImpairmentsofLongLivedAssetsImpairmentsofLongLivedAssetsDetails" xlink:type="extended" id="i37fd8a97ffef4a22b334f2523a900cd8_ImpairmentsofLongLivedAssetsImpairmentsofLongLivedAssetsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_7918d804-b572-4574-9342-ec8913cb0f0e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetImpairmentCharges_255252f6-875c-4b7c-b85a-5ed5126e00b6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_7918d804-b572-4574-9342-ec8913cb0f0e" xlink:to="loc_us-gaap_AssetImpairmentCharges_255252f6-875c-4b7c-b85a-5ed5126e00b6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_6d9ee603-2fea-4166-98aa-8fadfab5aa68" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsLineItems_7918d804-b572-4574-9342-ec8913cb0f0e" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_6d9ee603-2fea-4166-98aa-8fadfab5aa68" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_ProducttypeAxis_9f7b55fd-5537-49d0-ab7c-c3b0e8321281" xlink:href="lpx-20210930.xsd#lpx_ProducttypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_6d9ee603-2fea-4166-98aa-8fadfab5aa68" xlink:to="loc_lpx_ProducttypeAxis_9f7b55fd-5537-49d0-ab7c-c3b0e8321281" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_ProducttypeDomain_9f7b55fd-5537-49d0-ab7c-c3b0e8321281_default" xlink:href="lpx-20210930.xsd#lpx_ProducttypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_lpx_ProducttypeAxis_9f7b55fd-5537-49d0-ab7c-c3b0e8321281" xlink:to="loc_lpx_ProducttypeDomain_9f7b55fd-5537-49d0-ab7c-c3b0e8321281_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_ProducttypeDomain_b8793ad4-5326-4ebd-af1f-7d09e22d883b" xlink:href="lpx-20210930.xsd#lpx_ProducttypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_lpx_ProducttypeAxis_9f7b55fd-5537-49d0-ab7c-c3b0e8321281" xlink:to="loc_lpx_ProducttypeDomain_b8793ad4-5326-4ebd-af1f-7d09e22d883b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_FiberproductionMember_e2febb91-4380-40dd-90e9-9ef87f9a22a3" xlink:href="lpx-20210930.xsd#lpx_FiberproductionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lpx_ProducttypeDomain_b8793ad4-5326-4ebd-af1f-7d09e22d883b" xlink:to="loc_lpx_FiberproductionMember_e2febb91-4380-40dd-90e9-9ef87f9a22a3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_EastRiverMember_d69304d6-a560-4410-b593-e11a6888e763" xlink:href="lpx-20210930.xsd#lpx_EastRiverMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lpx_ProducttypeDomain_b8793ad4-5326-4ebd-af1f-7d09e22d883b" xlink:to="loc_lpx_EastRiverMember_d69304d6-a560-4410-b593-e11a6888e763" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationAxis_c77b2dc9-be35-486a-b1eb-21e5e480aaa9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsTable_6d9ee603-2fea-4166-98aa-8fadfab5aa68" xlink:to="loc_us-gaap_DisposalGroupClassificationAxis_c77b2dc9-be35-486a-b1eb-21e5e480aaa9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_c77b2dc9-be35-486a-b1eb-21e5e480aaa9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_c77b2dc9-be35-486a-b1eb-21e5e480aaa9" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_c77b2dc9-be35-486a-b1eb-21e5e480aaa9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupClassificationDomain_2a91a5a4-383b-4a7e-8d1a-0c45212f2415" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupClassificationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DisposalGroupClassificationAxis_c77b2dc9-be35-486a-b1eb-21e5e480aaa9" xlink:to="loc_us-gaap_DisposalGroupClassificationDomain_2a91a5a4-383b-4a7e-8d1a-0c45212f2415" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupNotDiscontinuedOperationsMember_5626f39b-a620-4988-8261-0e406dc01646" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupNotDiscontinuedOperationsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisposalGroupClassificationDomain_2a91a5a4-383b-4a7e-8d1a-0c45212f2415" xlink:to="loc_us-gaap_DisposalGroupNotDiscontinuedOperationsMember_5626f39b-a620-4988-8261-0e406dc01646" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/ProductWarrantyDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#ProductWarrantyDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/ProductWarrantyDetails" xlink:type="extended" id="id75166aa3f7a488da602e304ff698a4c_ProductWarrantyDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductLiabilityContingencyLineItems_7e8aecaf-d29d-409a-9148-d8000eb15175" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductLiabilityContingencyLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward_883dd085-da94-44cd-a449-2592c8232af0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductLiabilityContingencyLineItems_7e8aecaf-d29d-409a-9148-d8000eb15175" xlink:to="loc_us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward_883dd085-da94-44cd-a449-2592c8232af0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrual_f5f69da2-54fc-437b-b0ae-5ee3ba053a0c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductWarrantyAccrual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward_883dd085-da94-44cd-a449-2592c8232af0" xlink:to="loc_us-gaap_ProductWarrantyAccrual_f5f69da2-54fc-437b-b0ae-5ee3ba053a0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrualWarrantiesIssued_b3966ab9-0b64-470a-8a59-c56a81bd54b8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductWarrantyAccrualWarrantiesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward_883dd085-da94-44cd-a449-2592c8232af0" xlink:to="loc_us-gaap_ProductWarrantyAccrualWarrantiesIssued_b3966ab9-0b64-470a-8a59-c56a81bd54b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrualPayments_825dd302-cb77-48a7-b8e6-6628dc7a5f7a" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductWarrantyAccrualPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInStandardAndExtendedProductWarrantyIncreaseDecreaseRollForward_883dd085-da94-44cd-a449-2592c8232af0" xlink:to="loc_us-gaap_ProductWarrantyAccrualPayments_825dd302-cb77-48a7-b8e6-6628dc7a5f7a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrual_4e872a7b-bcd3-4238-b40f-cc4ab6f4c0e6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductWarrantyAccrual"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrualClassifiedCurrent_6c85c1de-6fc0-4459-9bf7-144438c60d93" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductWarrantyAccrualClassifiedCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductLiabilityContingencyLineItems_7e8aecaf-d29d-409a-9148-d8000eb15175" xlink:to="loc_us-gaap_ProductWarrantyAccrualClassifiedCurrent_6c85c1de-6fc0-4459-9bf7-144438c60d93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductWarrantyAccrualNoncurrent_7218eb5f-9ca7-4b3d-9c65-a8c95bc4f17e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductWarrantyAccrualNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ProductLiabilityContingencyLineItems_7e8aecaf-d29d-409a-9148-d8000eb15175" xlink:to="loc_us-gaap_ProductWarrantyAccrualNoncurrent_7218eb5f-9ca7-4b3d-9c65-a8c95bc4f17e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProductLiabilityContingencyTable_12ec07eb-6955-41c5-bff7-98f78691af56" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProductLiabilityContingencyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ProductLiabilityContingencyLineItems_7e8aecaf-d29d-409a-9148-d8000eb15175" xlink:to="loc_us-gaap_ProductLiabilityContingencyTable_12ec07eb-6955-41c5-bff7-98f78691af56" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_f95bec35-da1b-435c-8077-10940b6b81a7" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ProductLiabilityContingencyTable_12ec07eb-6955-41c5-bff7-98f78691af56" xlink:to="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_f95bec35-da1b-435c-8077-10940b6b81a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_f95bec35-da1b-435c-8077-10940b6b81a7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_f95bec35-da1b-435c-8077-10940b6b81a7" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_f95bec35-da1b-435c-8077-10940b6b81a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9b0c0e56-955b-40ac-b958-4be1ced9500c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis_f95bec35-da1b-435c-8077-10940b6b81a7" xlink:to="loc_us-gaap_DisposalGroupsIncludingDiscontinuedOperationsNameDomain_9b0c0e56-955b-40ac-b958-4be1ced9500c" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/DefinedBenefitPensionPlansDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#DefinedBenefitPensionPlansDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/DefinedBenefitPensionPlansDetails" xlink:type="extended" id="i30ce90b7282045ff80673ca825802fd2_DefinedBenefitPensionPlansDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_5a985509-cbff-490f-8539-d6315ea3dadd" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanDisclosureLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_ef4983df-3f0c-4f64-a9a8-62370039e321" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_5a985509-cbff-490f-8539-d6315ea3dadd" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_ef4983df-3f0c-4f64-a9a8-62370039e321" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_3c52822b-6c6a-4d22-825f-4769d6d8fa7c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_ef4983df-3f0c-4f64-a9a8-62370039e321" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_3c52822b-6c6a-4d22-825f-4769d6d8fa7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_33018fc9-1b01-4761-800a-44a2d7ec15ee" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_ef4983df-3f0c-4f64-a9a8-62370039e321" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_33018fc9-1b01-4761-800a-44a2d7ec15ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_fad32062-893b-4386-9fea-d88397e75c19" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_ef4983df-3f0c-4f64-a9a8-62370039e321" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_fad32062-893b-4386-9fea-d88397e75c19" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_2aa111c4-20ac-4b51-901e-b2241ef11523" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_ef4983df-3f0c-4f64-a9a8-62370039e321" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_2aa111c4-20ac-4b51-901e-b2241ef11523" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_2aa36d5a-72a0-4274-9643-4ca0651a97bb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_ef4983df-3f0c-4f64-a9a8-62370039e321" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfGainsLosses_2aa36d5a-72a0-4274-9643-4ca0651a97bb" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1caa1798-ef85-4b73-aa29-b4230072b04e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract_ef4983df-3f0c-4f64-a9a8-62370039e321" xlink:to="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_1caa1798-ef85-4b73-aa29-b4230072b04e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1d624fdc-9449-408e-9279-03811b61baa3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlanDisclosureLineItems_5a985509-cbff-490f-8539-d6315ea3dadd" xlink:to="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1d624fdc-9449-408e-9279-03811b61baa3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameAxis_174cd031-1db1-40fb-a8c3-3ddf23434ed5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTable_1d624fdc-9449-408e-9279-03811b61baa3" xlink:to="loc_us-gaap_RetirementPlanNameAxis_174cd031-1db1-40fb-a8c3-3ddf23434ed5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameDomain_174cd031-1db1-40fb-a8c3-3ddf23434ed5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanNameAxis_174cd031-1db1-40fb-a8c3-3ddf23434ed5" xlink:to="loc_us-gaap_RetirementPlanNameDomain_174cd031-1db1-40fb-a8c3-3ddf23434ed5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanNameDomain_8aa3871e-ff86-49d7-b8d3-27669a0630d5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RetirementPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanNameAxis_174cd031-1db1-40fb-a8c3-3ddf23434ed5" xlink:to="loc_us-gaap_RetirementPlanNameDomain_8aa3871e-ff86-49d7-b8d3-27669a0630d5" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/OtherComprehensiveIncomeOtherComprehensiveIncomeTables" xlink:type="simple" xlink:href="lpx-20210930.xsd#OtherComprehensiveIncomeOtherComprehensiveIncomeTables"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/OtherComprehensiveIncomeOtherComprehensiveIncomeTables" xlink:type="extended" id="ic2dbe3d5ff2c491283bd931b260fca0b_OtherComprehensiveIncomeOtherComprehensiveIncomeTables">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_50793bd7-261e-431b-8b62-ccbd5c37fd46" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_933045b6-8238-4348-bb91-7eb1f459b01e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_50793bd7-261e-431b-8b62-ccbd5c37fd46" xlink:to="loc_us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock_933045b6-8238-4348-bb91-7eb1f459b01e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_764c5452-fc4a-4d5d-85b0-575b20c39604" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_50793bd7-261e-431b-8b62-ccbd5c37fd46" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_764c5452-fc4a-4d5d-85b0-575b20c39604" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_2dbbd32e-15a2-4a76-bd82-9d54ba5e6886" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_764c5452-fc4a-4d5d-85b0-575b20c39604" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_2dbbd32e-15a2-4a76-bd82-9d54ba5e6886" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_2dbbd32e-15a2-4a76-bd82-9d54ba5e6886_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2dbbd32e-15a2-4a76-bd82-9d54ba5e6886" xlink:to="loc_us-gaap_EquityComponentDomain_2dbbd32e-15a2-4a76-bd82-9d54ba5e6886_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_42b0a0b8-4eea-4597-874c-b14ff0eccdfb" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2dbbd32e-15a2-4a76-bd82-9d54ba5e6886" xlink:to="loc_us-gaap_EquityComponentDomain_42b0a0b8-4eea-4597-874c-b14ff0eccdfb" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/OtherComprehensiveIncomeDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#OtherComprehensiveIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/OtherComprehensiveIncomeDetails" xlink:type="extended" id="i4bdda3d5d06d456786ec3b6a5f902d53_OtherComprehensiveIncomeDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_e8049bb0-0b7d-4145-ac74-beedca758bc3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_fe0536f4-97c2-453c-9877-4af9dc0754ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e8049bb0-0b7d-4145-ac74-beedca758bc3" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_fe0536f4-97c2-453c-9877-4af9dc0754ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_dea0eb30-43ee-4cd2-a637-2c36f8e0296b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e8049bb0-0b7d-4145-ac74-beedca758bc3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax_dea0eb30-43ee-4cd2-a637-2c36f8e0296b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_0d5c3326-0cdd-4137-a6cf-4657e1f1ec57" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e8049bb0-0b7d-4145-ac74-beedca758bc3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_0d5c3326-0cdd-4137-a6cf-4657e1f1ec57" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_fb1ddefb-c746-4144-b7a2-1d9a482f35aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_e8049bb0-0b7d-4145-ac74-beedca758bc3" xlink:to="loc_us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax_fb1ddefb-c746-4144-b7a2-1d9a482f35aa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_560d6ea8-d88e-420c-87d7-f970a599417e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8a244688-2dea-4dd9-9496-3bee4bf999e9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_e8049bb0-0b7d-4145-ac74-beedca758bc3" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8a244688-2dea-4dd9-9496-3bee4bf999e9" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_76b80e92-a85b-408a-bd32-581c837bcde5" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_8a244688-2dea-4dd9-9496-3bee4bf999e9" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_76b80e92-a85b-408a-bd32-581c837bcde5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_76b80e92-a85b-408a-bd32-581c837bcde5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_76b80e92-a85b-408a-bd32-581c837bcde5" xlink:to="loc_us-gaap_EquityComponentDomain_76b80e92-a85b-408a-bd32-581c837bcde5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_efb63adb-1074-4558-b490-2a26d9330f45" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_76b80e92-a85b-408a-bd32-581c837bcde5" xlink:to="loc_us-gaap_EquityComponentDomain_efb63adb-1074-4558-b490-2a26d9330f45" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_e4c01e9f-8ae8-48ad-ad95-ca517052ab47" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_efb63adb-1074-4558-b490-2a26d9330f45" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_e4c01e9f-8ae8-48ad-ad95-ca517052ab47" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_d7827296-e1ae-426d-9ddf-1161d5216e2b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_efb63adb-1074-4558-b490-2a26d9330f45" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_d7827296-e1ae-426d-9ddf-1161d5216e2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_f9be3aad-6f31-4b3f-9cf4-d3687c8cc63e" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_efb63adb-1074-4558-b490-2a26d9330f45" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_f9be3aad-6f31-4b3f-9cf4-d3687c8cc63e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_92a41e32-4955-4026-abdf-07359d1d1099" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_efb63adb-1074-4558-b490-2a26d9330f45" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_92a41e32-4955-4026-abdf-07359d1d1099" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/SelectedSegmentDataDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#SelectedSegmentDataDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/SelectedSegmentDataDetails" xlink:type="extended" id="if5a78d15d9b641de9cda5c34f6b6ec64_SelectedSegmentDataDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_2d8c27ed-b391-4c0d-8b4e-09733235b251" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_us-gaap_Revenues_2d8c27ed-b391-4c0d-8b4e-09733235b251" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_63fd7bd4-ffd0-48da-861a-72fd3ab9d9f6" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_us-gaap_ProfitLoss_63fd7bd4-ffd0-48da-861a-72fd3ab9d9f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_bb5f36d5-f3d5-4872-9c7c-6b82b21ff7c2" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest_bb5f36d5-f3d5-4872-9c7c-6b82b21ff7c2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_2987c3e0-151e-4389-aa98-f084990e31c9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_us-gaap_NetIncomeLoss_2987c3e0-151e-4389-aa98-f084990e31c9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_79373d83-741b-4879-96e3-4aa25d46c88b" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_79373d83-741b-4879-96e3-4aa25d46c88b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_b740b5b4-ca7f-4f48-9a76-3333617ec8d0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_b740b5b4-ca7f-4f48-9a76-3333617ec8d0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherSellingGeneralAndAdministrativeExpense_d99d5e3e-f00b-42b5-8190-28dfca44a7aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_OtherSellingGeneralAndAdministrativeExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_us-gaap_OtherSellingGeneralAndAdministrativeExpense_d99d5e3e-f00b-42b5-8190-28dfca44a7aa" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_Assetimpairmentattributabletoparent_ceab0f8c-2637-47b1-9878-ad52ba0408d8" xlink:href="lpx-20210930.xsd#lpx_Assetimpairmentattributabletoparent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_lpx_Assetimpairmentattributabletoparent_ceab0f8c-2637-47b1-9878-ad52ba0408d8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_Otheroperatingincomeexpenseexclusiveofproductdiscontinuancecharges_64ca1836-c26b-436f-b7f7-3ccc0cded14f" xlink:href="lpx-20210930.xsd#lpx_Otheroperatingincomeexpenseexclusiveofproductdiscontinuancecharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_lpx_Otheroperatingincomeexpenseexclusiveofproductdiscontinuancecharges_64ca1836-c26b-436f-b7f7-3ccc0cded14f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_Productlinediscontinuancecharges_b532b466-a788-49aa-ac6d-fadb6a6fda65" xlink:href="lpx-20210930.xsd#lpx_Productlinediscontinuancecharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_lpx_Productlinediscontinuancecharges_b532b466-a788-49aa-ac6d-fadb6a6fda65" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_212b23cc-c35d-41dc-b358-b5e0bb8e4a3c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_us-gaap_GainsLossesOnExtinguishmentOfDebt_212b23cc-c35d-41dc-b358-b5e0bb8e4a3c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_ca1a0fb7-217a-4a8f-a4a7-0976c8f7bdac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_us-gaap_InterestExpense_ca1a0fb7-217a-4a8f-a4a7-0976c8f7bdac" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_InvestmentIncomeNetOfAdjustments_cd4aab40-57cc-48c2-a903-be608f3c6920" xlink:href="lpx-20210930.xsd#lpx_InvestmentIncomeNetOfAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_lpx_InvestmentIncomeNetOfAdjustments_cd4aab40-57cc-48c2-a903-be608f3c6920" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_OtherNonoperatingIncomeExpenseNetOfDebtExtinguishment_388db807-a0a9-4e73-940a-5c495b0b3745" xlink:href="lpx-20210930.xsd#lpx_OtherNonoperatingIncomeExpenseNetOfDebtExtinguishment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_lpx_OtherNonoperatingIncomeExpenseNetOfDebtExtinguishment_388db807-a0a9-4e73-940a-5c495b0b3745" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_AdjustedEBITDA_ca414ec1-a999-4474-b958-41cd210c0add" xlink:href="lpx-20210930.xsd#lpx_AdjustedEBITDA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_lpx_AdjustedEBITDA_ca414ec1-a999-4474-b958-41cd210c0add" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_161221fd-394f-40e4-86f3-7d8c7d6b10d3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_478e6870-fbb8-4dad-b253-298344f8a547" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_161221fd-394f-40e4-86f3-7d8c7d6b10d3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d3bc9597-e4fb-46b7-ae42-de1dd56dd1b3" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_161221fd-394f-40e4-86f3-7d8c7d6b10d3" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d3bc9597-e4fb-46b7-ae42-de1dd56dd1b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_d3bc9597-e4fb-46b7-ae42-de1dd56dd1b3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d3bc9597-e4fb-46b7-ae42-de1dd56dd1b3" xlink:to="loc_us-gaap_RelatedPartyDomain_d3bc9597-e4fb-46b7-ae42-de1dd56dd1b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_43a298ad-8638-4456-8bac-23720b15a569" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d3bc9597-e4fb-46b7-ae42-de1dd56dd1b3" xlink:to="loc_us-gaap_RelatedPartyDomain_43a298ad-8638-4456-8bac-23720b15a569" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_cd953538-ccc9-4ce7-b21e-680d0a51b329" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_161221fd-394f-40e4-86f3-7d8c7d6b10d3" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_cd953538-ccc9-4ce7-b21e-680d0a51b329" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_cd953538-ccc9-4ce7-b21e-680d0a51b329_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_cd953538-ccc9-4ce7-b21e-680d0a51b329" xlink:to="loc_us-gaap_SegmentDomain_cd953538-ccc9-4ce7-b21e-680d0a51b329_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_74bce8fc-0dce-47b5-aa66-c175adb81454" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_cd953538-ccc9-4ce7-b21e-680d0a51b329" xlink:to="loc_us-gaap_SegmentDomain_74bce8fc-0dce-47b5-aa66-c175adb81454" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_SidingMember_367f5606-c88b-4fef-83ea-50124990288c" xlink:href="lpx-20210930.xsd#lpx_SidingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_74bce8fc-0dce-47b5-aa66-c175adb81454" xlink:to="loc_lpx_SidingMember_367f5606-c88b-4fef-83ea-50124990288c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_OsbMember_a684a485-bec4-454f-973f-e612f53d16d8" xlink:href="lpx-20210930.xsd#lpx_OsbMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_74bce8fc-0dce-47b5-aa66-c175adb81454" xlink:to="loc_lpx_OsbMember_a684a485-bec4-454f-973f-e612f53d16d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_EWPMember_97fd299d-1219-4256-a09e-562bf3457ed3" xlink:href="lpx-20210930.xsd#lpx_EWPMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_74bce8fc-0dce-47b5-aa66-c175adb81454" xlink:to="loc_lpx_EWPMember_97fd299d-1219-4256-a09e-562bf3457ed3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllOtherSegmentsMember_cb047b3a-1f82-4213-a847-cced52a3f651" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_AllOtherSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_74bce8fc-0dce-47b5-aa66-c175adb81454" xlink:to="loc_us-gaap_AllOtherSegmentsMember_cb047b3a-1f82-4213-a847-cced52a3f651" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_CorporateUnallocatedMember_01dd2784-14a9-4bb1-9cc0-0651782bb660" xlink:href="lpx-20210930.xsd#lpx_CorporateUnallocatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_74bce8fc-0dce-47b5-aa66-c175adb81454" xlink:to="loc_lpx_CorporateUnallocatedMember_01dd2784-14a9-4bb1-9cc0-0651782bb660" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_IntersegmentMember_a109a810-b1e9-4f68-99c8-4082075489f0" xlink:href="lpx-20210930.xsd#lpx_IntersegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_74bce8fc-0dce-47b5-aa66-c175adb81454" xlink:to="loc_lpx_IntersegmentMember_a109a810-b1e9-4f68-99c8-4082075489f0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_LPSouthAmericaMember_b15999e1-392d-44ab-9410-ea6d3ecab8ed" xlink:href="lpx-20210930.xsd#lpx_LPSouthAmericaMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_74bce8fc-0dce-47b5-aa66-c175adb81454" xlink:to="loc_lpx_LPSouthAmericaMember_b15999e1-392d-44ab-9410-ea6d3ecab8ed" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_ProducttypeAxis_673ed4f9-232b-4c73-b840-96bb5fd9ef57" xlink:href="lpx-20210930.xsd#lpx_ProducttypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_161221fd-394f-40e4-86f3-7d8c7d6b10d3" xlink:to="loc_lpx_ProducttypeAxis_673ed4f9-232b-4c73-b840-96bb5fd9ef57" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_ProducttypeDomain_673ed4f9-232b-4c73-b840-96bb5fd9ef57_default" xlink:href="lpx-20210930.xsd#lpx_ProducttypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_lpx_ProducttypeAxis_673ed4f9-232b-4c73-b840-96bb5fd9ef57" xlink:to="loc_lpx_ProducttypeDomain_673ed4f9-232b-4c73-b840-96bb5fd9ef57_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_ProducttypeDomain_c7439ea5-0ecb-4f59-9672-6ddd614da936" xlink:href="lpx-20210930.xsd#lpx_ProducttypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_lpx_ProducttypeAxis_673ed4f9-232b-4c73-b840-96bb5fd9ef57" xlink:to="loc_lpx_ProducttypeDomain_c7439ea5-0ecb-4f59-9672-6ddd614da936" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_ValueaddMember_091264cd-8ea6-43c2-94ab-de52ecdf4e77" xlink:href="lpx-20210930.xsd#lpx_ValueaddMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_lpx_ProducttypeDomain_c7439ea5-0ecb-4f59-9672-6ddd614da936" xlink:to="loc_lpx_ValueaddMember_091264cd-8ea6-43c2-94ab-de52ecdf4e77" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_8831fac6-7fae-4965-b567-a6081b2c7a06" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_161221fd-394f-40e4-86f3-7d8c7d6b10d3" xlink:to="loc_srt_ProductOrServiceAxis_8831fac6-7fae-4965-b567-a6081b2c7a06" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_8831fac6-7fae-4965-b567-a6081b2c7a06_default" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_8831fac6-7fae-4965-b567-a6081b2c7a06" xlink:to="loc_srt_ProductsAndServicesDomain_8831fac6-7fae-4965-b567-a6081b2c7a06_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_c5bffb78-87fc-4e34-a70c-2644aab305c2" xlink:href="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_8831fac6-7fae-4965-b567-a6081b2c7a06" xlink:to="loc_srt_ProductsAndServicesDomain_c5bffb78-87fc-4e34-a70c-2644aab305c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_LSLMember_c2dc10fe-f4d9-45f4-940e-38d885997434" xlink:href="lpx-20210930.xsd#lpx_LSLMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c5bffb78-87fc-4e34-a70c-2644aab305c2" xlink:to="loc_lpx_LSLMember_c2dc10fe-f4d9-45f4-940e-38d885997434" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/SubsequentEventsNotes" xlink:type="simple" xlink:href="lpx-20210930.xsd#SubsequentEventsNotes"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/SubsequentEventsNotes" xlink:type="extended" id="ie142f248f5fd446689ec7b6cf13a9de8_SubsequentEventsNotes">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_db43df61-73fa-419f-9993-98708ed63ea9" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventsTextBlock_7c7d1fc3-8563-4dab-9cfe-c43a85d93d23" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventsTextBlock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_db43df61-73fa-419f-9993-98708ed63ea9" xlink:to="loc_us-gaap_SubsequentEventsTextBlock_7c7d1fc3-8563-4dab-9cfe-c43a85d93d23" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_eb1178a1-5c9e-471c-acf4-bc9dfcbc7e46" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_db43df61-73fa-419f-9993-98708ed63ea9" xlink:to="loc_us-gaap_SubsequentEventTable_eb1178a1-5c9e-471c-acf4-bc9dfcbc7e46" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_1b465a04-9343-4cfd-8626-7cd531440b80" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_eb1178a1-5c9e-471c-acf4-bc9dfcbc7e46" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_1b465a04-9343-4cfd-8626-7cd531440b80" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_1b465a04-9343-4cfd-8626-7cd531440b80_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_1b465a04-9343-4cfd-8626-7cd531440b80" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_1b465a04-9343-4cfd-8626-7cd531440b80_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_cb20c2a7-b08f-4adc-9bee-ecca83743875" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_1b465a04-9343-4cfd-8626-7cd531440b80" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_cb20c2a7-b08f-4adc-9bee-ecca83743875" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.lpcorp.com/role/SubsequentEventsDetails" xlink:type="simple" xlink:href="lpx-20210930.xsd#SubsequentEventsDetails"/>
  <link:definitionLink xlink:role="http://www.lpcorp.com/role/SubsequentEventsDetails" xlink:type="extended" id="id9fa8eb0a55641a7819626742868af3e_SubsequentEventsDetails">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_0285286c-9011-40fe-8138-ae22170cc07c" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_b8e33fb6-13f5-4131-8f84-e6acf9f4d74d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_0285286c-9011-40fe-8138-ae22170cc07c" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_b8e33fb6-13f5-4131-8f84-e6acf9f4d74d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_lpx_CommonstockSharesacquired_e5c88aef-a463-4e71-b8d1-6bdb9e786023" xlink:href="lpx-20210930.xsd#lpx_CommonstockSharesacquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_0285286c-9011-40fe-8138-ae22170cc07c" xlink:to="loc_lpx_CommonstockSharesacquired_e5c88aef-a463-4e71-b8d1-6bdb9e786023" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesRetired_ee40ca73-7804-45cd-b811-3747700638aa" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_TreasuryStockSharesRetired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_0285286c-9011-40fe-8138-ae22170cc07c" xlink:to="loc_us-gaap_TreasuryStockSharesRetired_ee40ca73-7804-45cd-b811-3747700638aa" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_ff866d02-f08b-4e02-b9cd-443a5c358468" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_0285286c-9011-40fe-8138-ae22170cc07c" xlink:to="loc_us-gaap_SubsequentEventTable_ff866d02-f08b-4e02-b9cd-443a5c358468" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_6e1655d4-7a09-4b7a-bb76-513ed49c3e33" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_ff866d02-f08b-4e02-b9cd-443a5c358468" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_6e1655d4-7a09-4b7a-bb76-513ed49c3e33" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_6e1655d4-7a09-4b7a-bb76-513ed49c3e33_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_6e1655d4-7a09-4b7a-bb76-513ed49c3e33" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_6e1655d4-7a09-4b7a-bb76-513ed49c3e33_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_4db6d32c-c9c7-4754-90a9-82b8f03393f0" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_6e1655d4-7a09-4b7a-bb76-513ed49c3e33" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_4db6d32c-c9c7-4754-90a9-82b8f03393f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_2d9860f2-605c-47b9-9e8e-feef20e7b6ac" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_4db6d32c-c9c7-4754-90a9-82b8f03393f0" xlink:to="loc_us-gaap_SubsequentEventMember_2d9860f2-605c-47b9-9e8e-feef20e7b6ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_cb923711-a309-4e5f-82be-ae5189e9b5c8" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_ff866d02-f08b-4e02-b9cd-443a5c358468" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_cb923711-a309-4e5f-82be-ae5189e9b5c8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_cb923711-a309-4e5f-82be-ae5189e9b5c8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_cb923711-a309-4e5f-82be-ae5189e9b5c8" xlink:to="loc_us-gaap_EquityComponentDomain_cb923711-a309-4e5f-82be-ae5189e9b5c8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_36091442-f63d-43b9-9c8d-85203b21a445" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_cb923711-a309-4e5f-82be-ae5189e9b5c8" xlink:to="loc_us-gaap_EquityComponentDomain_36091442-f63d-43b9-9c8d-85203b21a445" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_ed3bea5f-18ea-45d2-9a0a-c4df89632a9d" xlink:href="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_36091442-f63d-43b9-9c8d-85203b21a445" xlink:to="loc_us-gaap_CommonStockMember_ed3bea5f-18ea-45d2-9a0a-c4df89632a9d" xlink:type="arc" order="0"/>
  </link:definitionLink>
</link:linkbase>
