<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2025 Workiva-->
<!--r:724909fa-5dd2-4425-a744-0d0ba8f5413a,g:7ca74f5a-5670-4e25-a983-18d5297c3e24-->
<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.publix.com/role/DocumentandEntityInformation" xlink:type="simple" xlink:href="ck0000081061-20250329.xsd#DocumentandEntityInformation"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/DocumentandEntityInformation" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_6e9698d4-d28c-4a5d-8a1c-d1209fbcdd30" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntitiesTable_6e9698d4-d28c-4a5d-8a1c-d1209fbcdd30" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_c7072f5e-fdea-4145-aedd-421803957e78" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_6e9698d4-d28c-4a5d-8a1c-d1209fbcdd30" xlink:to="loc_dei_LegalEntityAxis_c7072f5e-fdea-4145-aedd-421803957e78" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_c7072f5e-fdea-4145-aedd-421803957e78_default" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_c7072f5e-fdea-4145-aedd-421803957e78" xlink:to="loc_dei_EntityDomain_c7072f5e-fdea-4145-aedd-421803957e78_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_56d41277-ab38-421c-8bfd-a265967243ab" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_c7072f5e-fdea-4145-aedd-421803957e78" xlink:to="loc_dei_EntityDomain_56d41277-ab38-421c-8bfd-a265967243ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_db053334-6131-4f76-af90-c4926df1af91" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_DocumentType_db053334-6131-4f76-af90-c4926df1af91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentQuarterlyReport_dfad92f5-8f11-4535-acdb-8765c9ce06ad" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentQuarterlyReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_DocumentQuarterlyReport_dfad92f5-8f11-4535-acdb-8765c9ce06ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_4def10bb-bba8-4407-ad45-ea5b3375c9ad" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_AmendmentFlag_4def10bb-bba8-4407-ad45-ea5b3375c9ad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_2477869c-ebc3-4998-8970-c730efb1a125" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_DocumentPeriodEndDate_2477869c-ebc3-4998-8970-c730efb1a125" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentTransitionReport_0f3c003a-1b0a-4e33-b908-48ce2d4de4bd" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_DocumentTransitionReport_0f3c003a-1b0a-4e33-b908-48ce2d4de4bd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalYearFocus_b4930f87-ce8d-4bcc-a846-65715546ab34" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_DocumentFiscalYearFocus_b4930f87-ce8d-4bcc-a846-65715546ab34" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentFiscalPeriodFocus_a5575b35-bbc3-4d1d-adbb-010246e49010" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_DocumentFiscalPeriodFocus_a5575b35-bbc3-4d1d-adbb-010246e49010" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_c58624f9-26b7-4b92-8ef7-0c30da5c8b46" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityFileNumber_c58624f9-26b7-4b92-8ef7-0c30da5c8b46" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_230f9ae3-4ea1-475c-b72f-4be272ead1e0" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityRegistrantName_230f9ae3-4ea1-475c-b72f-4be272ead1e0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_a240260c-9186-42cb-8268-0a29c87e6204" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityCentralIndexKey_a240260c-9186-42cb-8268-0a29c87e6204" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_62bb2305-36cb-4ceb-b204-05043922ca81" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityIncorporationStateCountryCode_62bb2305-36cb-4ceb-b204-05043922ca81" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_c8d55355-44da-4c50-bae3-fe12a6fb0378" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityTaxIdentificationNumber_c8d55355-44da-4c50-bae3-fe12a6fb0378" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_69c795ac-3a32-4c9b-b32f-1f462d0e672d" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityAddressAddressLine1_69c795ac-3a32-4c9b-b32f-1f462d0e672d" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_0ed155b3-6c8c-480c-85ed-82b20ac3aa55" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityAddressCityOrTown_0ed155b3-6c8c-480c-85ed-82b20ac3aa55" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_c4f59dc7-631f-424f-9101-71c51b5c414f" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityAddressStateOrProvince_c4f59dc7-631f-424f-9101-71c51b5c414f" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_42df8ea7-2b2a-4f47-bf4a-9a906ae74fa6" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityAddressPostalZipCode_42df8ea7-2b2a-4f47-bf4a-9a906ae74fa6" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_6f790b0b-a66f-4f34-a922-94d2affa77a2" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_CityAreaCode_6f790b0b-a66f-4f34-a922-94d2affa77a2" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_2c6d8127-cdc6-4a1b-8111-edcf8e77ecb9" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_LocalPhoneNumber_2c6d8127-cdc6-4a1b-8111-edcf8e77ecb9" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CurrentFiscalYearEndDate_9279b0ec-606e-4c2e-ac03-93b2e45c1d9a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_CurrentFiscalYearEndDate_9279b0ec-606e-4c2e-ac03-93b2e45c1d9a" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCurrentReportingStatus_973e68ba-e29b-45c3-ad36-d3541e38a34a" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityCurrentReportingStatus_973e68ba-e29b-45c3-ad36-d3541e38a34a" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInteractiveDataCurrent_05cca559-e48a-410c-9bbc-49e2531067af" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityInteractiveDataCurrent_05cca559-e48a-410c-9bbc-49e2531067af" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFilerCategory_9d85b1ec-c428-4eb1-80da-0dabb827c757" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityFilerCategory_9d85b1ec-c428-4eb1-80da-0dabb827c757" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitySmallBusiness_923c1ce6-fe66-4d28-96e5-c671488a4b1b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntitySmallBusiness_923c1ce6-fe66-4d28-96e5-c671488a4b1b" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_ff0111f7-1de1-4723-af98-59187702a726" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityEmergingGrowthCompany_ff0111f7-1de1-4723-af98-59187702a726" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityShellCompany_500dd95a-960c-422a-9a81-7a0f4302fa7b" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityShellCompany_500dd95a-960c-422a-9a81-7a0f4302fa7b" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCommonStockSharesOutstanding_f3e14f68-0fab-48af-84e5-24559ef4a58e" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_DocumentInformationLineItems_eff7e7b8-fb1c-4144-b9fc-3ae353fda09c" xlink:to="loc_dei_EntityCommonStockSharesOutstanding_f3e14f68-0fab-48af-84e5-24559ef4a58e" xlink:type="arc" order="25"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITYCONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITY" xlink:type="simple" xlink:href="ck0000081061-20250329.xsd#CONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITYCONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITY"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/CONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITYCONDENSEDCONSOLIDATEDSTATEMENTOFSTOCKHOLDERSEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_d72735ed-9798-47c7-85db-c33d6e271cfe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_38a153aa-8085-4e47-9de7-e63a4edbe57c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_d72735ed-9798-47c7-85db-c33d6e271cfe" xlink:to="loc_us-gaap_StatementTable_38a153aa-8085-4e47-9de7-e63a4edbe57c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_3d27b3d7-8aa3-4eb7-b969-8d7a3e8dc09f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_38a153aa-8085-4e47-9de7-e63a4edbe57c" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_3d27b3d7-8aa3-4eb7-b969-8d7a3e8dc09f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_3d27b3d7-8aa3-4eb7-b969-8d7a3e8dc09f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3d27b3d7-8aa3-4eb7-b969-8d7a3e8dc09f" xlink:to="loc_us-gaap_EquityComponentDomain_3d27b3d7-8aa3-4eb7-b969-8d7a3e8dc09f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_2c91c7e8-5097-42bc-a3a0-42b7d32e6b4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_3d27b3d7-8aa3-4eb7-b969-8d7a3e8dc09f" xlink:to="loc_us-gaap_EquityComponentDomain_2c91c7e8-5097-42bc-a3a0-42b7d32e6b4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_9757a4dd-495c-468a-9fab-0d9b4d4a400f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2c91c7e8-5097-42bc-a3a0-42b7d32e6b4b" xlink:to="loc_us-gaap_CommonStockMember_9757a4dd-495c-468a-9fab-0d9b4d4a400f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_c945d000-21f6-4d48-b670-7e924b8bee94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2c91c7e8-5097-42bc-a3a0-42b7d32e6b4b" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_c945d000-21f6-4d48-b670-7e924b8bee94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_a76be174-1519-490b-a43f-0a505adc9ab6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2c91c7e8-5097-42bc-a3a0-42b7d32e6b4b" xlink:to="loc_us-gaap_RetainedEarningsMember_a76be174-1519-490b-a43f-0a505adc9ab6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_763df64d-06fc-464d-96f0-61390a2cdb7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2c91c7e8-5097-42bc-a3a0-42b7d32e6b4b" xlink:to="loc_us-gaap_TreasuryStockCommonMember_763df64d-06fc-464d-96f0-61390a2cdb7a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_eb9f0f7c-4036-4298-9abc-915971e5490d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2c91c7e8-5097-42bc-a3a0-42b7d32e6b4b" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_eb9f0f7c-4036-4298-9abc-915971e5490d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_CommonStockRelatedToEsopMember_07409bab-6cb5-49c6-9b9d-17f2f018d96d" xlink:href="ck0000081061-20250329.xsd#ck0000081061_CommonStockRelatedToEsopMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_2c91c7e8-5097-42bc-a3a0-42b7d32e6b4b" xlink:to="loc_ck0000081061_CommonStockRelatedToEsopMember_07409bab-6cb5-49c6-9b9d-17f2f018d96d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b409e721-8c94-4a37-8559-d1a5e6dda6f6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_d72735ed-9798-47c7-85db-c33d6e271cfe" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b409e721-8c94-4a37-8559-d1a5e6dda6f6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_13831122-d534-4d95-a0dc-e012c75deb19" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b409e721-8c94-4a37-8559-d1a5e6dda6f6" xlink:to="loc_us-gaap_StockholdersEquity_13831122-d534-4d95-a0dc-e012c75deb19" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_f0ce07d2-8f09-4ee8-b297-749c14a7e713" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b409e721-8c94-4a37-8559-d1a5e6dda6f6" xlink:to="loc_us-gaap_ComprehensiveIncomeNetOfTax_f0ce07d2-8f09-4ee8-b297-749c14a7e713" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStock_7dd96f3e-9c72-417e-a89e-3ef3eeb2f947" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b409e721-8c94-4a37-8559-d1a5e6dda6f6" xlink:to="loc_us-gaap_DividendsCommonStock_7dd96f3e-9c72-417e-a89e-3ef3eeb2f947" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_a968590b-2e58-4122-86cf-b45ff0b9325f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b409e721-8c94-4a37-8559-d1a5e6dda6f6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueEmployeeStockOwnershipPlan_a968590b-2e58-4122-86cf-b45ff0b9325f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_f10eb3ba-af39-408e-9032-639ca529d010" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b409e721-8c94-4a37-8559-d1a5e6dda6f6" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_f10eb3ba-af39-408e-9032-639ca529d010" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_c33f1603-98cb-4e4d-9242-e93af6267087" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b409e721-8c94-4a37-8559-d1a5e6dda6f6" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueNewIssues_c33f1603-98cb-4e4d-9242-e93af6267087" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TemporaryEquityIssuePeriodIncreaseOrDecrease_e6b10c11-0fd8-46c7-8a44-43dbe83673bd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TemporaryEquityIssuePeriodIncreaseOrDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_b409e721-8c94-4a37-8559-d1a5e6dda6f6" xlink:to="loc_us-gaap_TemporaryEquityIssuePeriodIncreaseOrDecrease_e6b10c11-0fd8-46c7-8a44-43dbe83673bd" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_70a224cf-cdca-49dc-919f-c4d7344f24ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/FairValueMeasurementsforInvestmentsDetails" xlink:type="simple" xlink:href="ck0000081061-20250329.xsd#FairValueMeasurementsforInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/FairValueMeasurementsforInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_e16207ab-192e-4b29-bfd1-57d5021f5a88" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d5030442-0bc5-437f-861a-639f2bca587f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_e16207ab-192e-4b29-bfd1-57d5021f5a88" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d5030442-0bc5-437f-861a-639f2bca587f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2152efe3-0551-480d-a043-45eaece31278" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_d5030442-0bc5-437f-861a-639f2bca587f" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2152efe3-0551-480d-a043-45eaece31278" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_2152efe3-0551-480d-a043-45eaece31278_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2152efe3-0551-480d-a043-45eaece31278" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_2152efe3-0551-480d-a043-45eaece31278_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_27872274-0aa5-44ad-b87b-7b36137a397d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_2152efe3-0551-480d-a043-45eaece31278" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_27872274-0aa5-44ad-b87b-7b36137a397d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_8f00c4bf-d752-4bca-843a-16559bfd74ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_27872274-0aa5-44ad-b87b-7b36137a397d" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_8f00c4bf-d752-4bca-843a-16559bfd74ae" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_608d650c-3d7e-4f84-9813-503e18de9c5f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_27872274-0aa5-44ad-b87b-7b36137a397d" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_608d650c-3d7e-4f84-9813-503e18de9c5f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_865ff1cb-5db7-4961-a140-9249e1ee2353" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_27872274-0aa5-44ad-b87b-7b36137a397d" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_865ff1cb-5db7-4961-a140-9249e1ee2353" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecurities_365664da-aa21-4949-892c-88912051245a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketableSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_e16207ab-192e-4b29-bfd1-57d5021f5a88" xlink:to="loc_us-gaap_MarketableSecurities_365664da-aa21-4949-892c-88912051245a" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/AvailableforSaleDebtSecuritiesReconciliationDetails" xlink:type="simple" xlink:href="ck0000081061-20250329.xsd#AvailableforSaleDebtSecuritiesReconciliationDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/AvailableforSaleDebtSecuritiesReconciliationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5a7a554b-193a-4532-8629-c4ec2ae95ba8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_6889d908-4899-40f5-8202-d390ee166b46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5a7a554b-193a-4532-8629-c4ec2ae95ba8" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_6889d908-4899-40f5-8202-d390ee166b46" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_3a3ce250-f741-4a91-98a0-75d134e67f3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_6889d908-4899-40f5-8202-d390ee166b46" xlink:to="loc_us-gaap_FinancialInstrumentAxis_3a3ce250-f741-4a91-98a0-75d134e67f3e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_3a3ce250-f741-4a91-98a0-75d134e67f3e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_3a3ce250-f741-4a91-98a0-75d134e67f3e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_3a3ce250-f741-4a91-98a0-75d134e67f3e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_80e52687-9a0a-4894-b86b-3871ebcd517a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_3a3ce250-f741-4a91-98a0-75d134e67f3e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_80e52687-9a0a-4894-b86b-3871ebcd517a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_a5c474bc-a806-4b5d-aa7f-4a2f11e62858" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_80e52687-9a0a-4894-b86b-3871ebcd517a" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_a5c474bc-a806-4b5d-aa7f-4a2f11e62858" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_DebtSecuritiesRestrictedMember_d254e63f-a67b-4960-85bc-a376a0b473e7" xlink:href="ck0000081061-20250329.xsd#ck0000081061_DebtSecuritiesRestrictedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_80e52687-9a0a-4894-b86b-3871ebcd517a" xlink:to="loc_ck0000081061_DebtSecuritiesRestrictedMember_d254e63f-a67b-4960-85bc-a376a0b473e7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_89ae9801-97e3-4e8b-b1a3-ad2d91c99b7a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5a7a554b-193a-4532-8629-c4ec2ae95ba8" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAmortizedCostBasis_89ae9801-97e3-4e8b-b1a3-ad2d91c99b7a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain_09e324ef-9433-4bd6-9ec6-cf8ee44daddc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5a7a554b-193a-4532-8629-c4ec2ae95ba8" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedGain_09e324ef-9433-4bd6-9ec6-cf8ee44daddc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss_a3142ae3-ed7d-45bc-845c-410c654e1b19" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5a7a554b-193a-4532-8629-c4ec2ae95ba8" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesGrossUnrealizedLoss_a3142ae3-ed7d-45bc-845c-410c654e1b19" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_a5b48541-3b17-4729-82f0-837dcab00ce1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesDebtSecurities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_5a7a554b-193a-4532-8629-c4ec2ae95ba8" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtSecurities_a5b48541-3b17-4729-82f0-837dcab00ce1" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/TemporarilyImpairedAvailableforSaleDebtSecuritiesbyTimePeriodImpairedDetails" xlink:type="simple" xlink:href="ck0000081061-20250329.xsd#TemporarilyImpairedAvailableforSaleDebtSecuritiesbyTimePeriodImpairedDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/TemporarilyImpairedAvailableforSaleDebtSecuritiesbyTimePeriodImpairedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_f65916ad-0216-4ba0-9598-2dde70e04814" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_417a1f97-f993-4a81-9319-18a0588fb383" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_f65916ad-0216-4ba0-9598-2dde70e04814" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_417a1f97-f993-4a81-9319-18a0588fb383" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_be13369a-a022-49f8-8321-d98744f004df" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_417a1f97-f993-4a81-9319-18a0588fb383" xlink:to="loc_us-gaap_FinancialInstrumentAxis_be13369a-a022-49f8-8321-d98744f004df" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_be13369a-a022-49f8-8321-d98744f004df_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_be13369a-a022-49f8-8321-d98744f004df" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_be13369a-a022-49f8-8321-d98744f004df_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4dbd7553-ea05-4deb-bb62-9165fe92eb92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_be13369a-a022-49f8-8321-d98744f004df" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4dbd7553-ea05-4deb-bb62-9165fe92eb92" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_94f7a1e5-4fdc-4e08-8046-83fff79dc700" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4dbd7553-ea05-4deb-bb62-9165fe92eb92" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_94f7a1e5-4fdc-4e08-8046-83fff79dc700" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_DebtSecuritiesRestrictedMember_5a98b465-12a0-4f60-b21a-b90b87485214" xlink:href="ck0000081061-20250329.xsd#ck0000081061_DebtSecuritiesRestrictedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4dbd7553-ea05-4deb-bb62-9165fe92eb92" xlink:to="loc_ck0000081061_DebtSecuritiesRestrictedMember_5a98b465-12a0-4f60-b21a-b90b87485214" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_31f3a0b3-7f55-4545-aa20-757e5153b37d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_f65916ad-0216-4ba0-9598-2dde70e04814" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_31f3a0b3-7f55-4545-aa20-757e5153b37d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_955a30e5-986e-4499-91e2-6c25b737b57c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_f65916ad-0216-4ba0-9598-2dde70e04814" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_955a30e5-986e-4499-91e2-6c25b737b57c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_b8c28a92-f95f-4ae6-a32e-cd1d259bef94" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_f65916ad-0216-4ba0-9598-2dde70e04814" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_b8c28a92-f95f-4ae6-a32e-cd1d259bef94" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_6caa5afa-b824-4a98-af31-e3ce2c678c33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_f65916ad-0216-4ba0-9598-2dde70e04814" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_6caa5afa-b824-4a98-af31-e3ce2c678c33" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_d5a0b351-a6cd-42ba-8100-3cd367b41a39" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_f65916ad-0216-4ba0-9598-2dde70e04814" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_d5a0b351-a6cd-42ba-8100-3cd367b41a39" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_df827d43-7005-4e23-bec2-a09289e6f4ce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_f65916ad-0216-4ba0-9598-2dde70e04814" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_df827d43-7005-4e23-bec2-a09289e6f4ce" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/InvestmentsEquitySecuritiesDetails" xlink:type="simple" xlink:href="ck0000081061-20250329.xsd#InvestmentsEquitySecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/InvestmentsEquitySecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_c6dcc6dc-8523-42ae-a4e0-f3e001023817" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketableSecuritiesTable_abdf6c10-6c1f-492d-b54a-aeac81de43b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MarketableSecuritiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_c6dcc6dc-8523-42ae-a4e0-f3e001023817" xlink:to="loc_us-gaap_MarketableSecuritiesTable_abdf6c10-6c1f-492d-b54a-aeac81de43b8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_a18bbd8d-e753-4cc2-a66b-6bc99d523ee8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MarketableSecuritiesTable_abdf6c10-6c1f-492d-b54a-aeac81de43b8" xlink:to="loc_us-gaap_FinancialInstrumentAxis_a18bbd8d-e753-4cc2-a66b-6bc99d523ee8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_a18bbd8d-e753-4cc2-a66b-6bc99d523ee8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_a18bbd8d-e753-4cc2-a66b-6bc99d523ee8" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_a18bbd8d-e753-4cc2-a66b-6bc99d523ee8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ec99fb4e-78f7-4e9d-bd2d-00950657f0f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_a18bbd8d-e753-4cc2-a66b-6bc99d523ee8" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_ec99fb4e-78f7-4e9d-bd2d-00950657f0f1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_6de474cd-1c44-4fcd-8ace-ccfe58f7ce98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems_c6dcc6dc-8523-42ae-a4e0-f3e001023817" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_6de474cd-1c44-4fcd-8ace-ccfe58f7ce98" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/AccumulatedOtherComprehensiveEarningsLossesDetails" xlink:type="simple" xlink:href="ck0000081061-20250329.xsd#AccumulatedOtherComprehensiveEarningsLossesDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/AccumulatedOtherComprehensiveEarningsLossesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_a1af9a03-7dd8-478f-aa7b-8f82ba83155c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_c244ee73-64d9-4636-b575-f6f76bb1a2f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_a1af9a03-7dd8-478f-aa7b-8f82ba83155c" xlink:to="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_c244ee73-64d9-4636-b575-f6f76bb1a2f5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_ab487cc2-1e94-4cda-9173-5ca335076667" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTable_c244ee73-64d9-4636-b575-f6f76bb1a2f5" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_ab487cc2-1e94-4cda-9173-5ca335076667" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_ab487cc2-1e94-4cda-9173-5ca335076667_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_ab487cc2-1e94-4cda-9173-5ca335076667" xlink:to="loc_us-gaap_EquityComponentDomain_ab487cc2-1e94-4cda-9173-5ca335076667_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_506753c3-385f-4dd9-8b0d-fee083ad3c01" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_ab487cc2-1e94-4cda-9173-5ca335076667" xlink:to="loc_us-gaap_EquityComponentDomain_506753c3-385f-4dd9-8b0d-fee083ad3c01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_d9c727b1-729a-4ab6-94a5-95ebee62283c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_506753c3-385f-4dd9-8b0d-fee083ad3c01" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_d9c727b1-729a-4ab6-94a5-95ebee62283c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_455086a1-11d0-414e-b1a8-9397d1bacc00" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_506753c3-385f-4dd9-8b0d-fee083ad3c01" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_455086a1-11d0-414e-b1a8-9397d1bacc00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_bf39a422-c04a-4cbe-ad65-d99d00f4c9ab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_506753c3-385f-4dd9-8b0d-fee083ad3c01" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_bf39a422-c04a-4cbe-ad65-d99d00f4c9ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_7cdea798-7711-4189-8f09-0ff634918fd3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AOCIAttributableToParentNetOfTaxRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems_a1af9a03-7dd8-478f-aa7b-8f82ba83155c" xlink:to="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_7cdea798-7711-4189-8f09-0ff634918fd3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_fefe8494-95eb-4e85-9505-15a96b3378c6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_7cdea798-7711-4189-8f09-0ff634918fd3" xlink:to="loc_us-gaap_StockholdersEquity_fefe8494-95eb-4e85-9505-15a96b3378c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_65bb4057-e10b-4fa4-a0d5-ca15f9dfeca3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_7cdea798-7711-4189-8f09-0ff634918fd3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax_65bb4057-e10b-4fa4-a0d5-ca15f9dfeca3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_0d60bb8d-1801-4903-bb04-7f78abed580e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_7cdea798-7711-4189-8f09-0ff634918fd3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_0d60bb8d-1801-4903-bb04-7f78abed580e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_0f5de831-2173-4142-8497-7d7b8c331ae6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_7cdea798-7711-4189-8f09-0ff634918fd3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansNetOfTax_0f5de831-2173-4142-8497-7d7b8c331ae6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_a8433d7e-d289-42b1-905c-4a5284e652e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AOCIAttributableToParentNetOfTaxRollForward_7cdea798-7711-4189-8f09-0ff634918fd3" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTax_a8433d7e-d289-42b1-905c-4a5284e652e4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_f6eca236-59f8-41b2-9cc6-59d41adeb7ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.publix.com/role/SubsequentEventDetails" xlink:type="simple" xlink:href="ck0000081061-20250329.xsd#SubsequentEventDetails"/>
  <link:definitionLink xlink:role="http://www.publix.com/role/SubsequentEventDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_fb306807-d5b8-4c69-a580-b2ef9f573fff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_e39567b9-c944-469c-8145-5d3b8c0c84f7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_fb306807-d5b8-4c69-a580-b2ef9f573fff" xlink:to="loc_us-gaap_SubsequentEventTable_e39567b9-c944-469c-8145-5d3b8c0c84f7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_f8077a59-bcdb-4af9-8880-5d810c81d6c1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_e39567b9-c944-469c-8145-5d3b8c0c84f7" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_f8077a59-bcdb-4af9-8880-5d810c81d6c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_f8077a59-bcdb-4af9-8880-5d810c81d6c1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_f8077a59-bcdb-4af9-8880-5d810c81d6c1" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_f8077a59-bcdb-4af9-8880-5d810c81d6c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_178b2cb4-70de-4137-b5bf-c20545147f75" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_f8077a59-bcdb-4af9-8880-5d810c81d6c1" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_178b2cb4-70de-4137-b5bf-c20545147f75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_8cd3c30b-a352-49b5-88c2-f96a32ab12d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_178b2cb4-70de-4137-b5bf-c20545147f75" xlink:to="loc_us-gaap_SubsequentEventMember_8cd3c30b-a352-49b5-88c2-f96a32ab12d7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsAxis_20fbafc5-2868-4d15-b058-7d858e535ebb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_e39567b9-c944-469c-8145-5d3b8c0c84f7" xlink:to="loc_us-gaap_DividendsAxis_20fbafc5-2868-4d15-b058-7d858e535ebb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_20fbafc5-2868-4d15-b058-7d858e535ebb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DividendsAxis_20fbafc5-2868-4d15-b058-7d858e535ebb" xlink:to="loc_us-gaap_DividendsDomain_20fbafc5-2868-4d15-b058-7d858e535ebb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsDomain_154aaf5a-7b31-4c96-92fe-370ea1d097d7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DividendsAxis_20fbafc5-2868-4d15-b058-7d858e535ebb" xlink:to="loc_us-gaap_DividendsDomain_154aaf5a-7b31-4c96-92fe-370ea1d097d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0000081061_O2025Q2DividendsMember_a36e0c5a-7880-4c4a-9a90-4f4c790d0ed1" xlink:href="ck0000081061-20250329.xsd#ck0000081061_O2025Q2DividendsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsDomain_154aaf5a-7b31-4c96-92fe-370ea1d097d7" xlink:to="loc_ck0000081061_O2025Q2DividendsMember_a36e0c5a-7880-4c4a-9a90-4f4c790d0ed1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_936fb181-d94d-4b57-9eeb-cc9dc845ff30" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableDateDeclaredDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_fb306807-d5b8-4c69-a580-b2ef9f573fff" xlink:to="loc_us-gaap_DividendsPayableDateDeclaredDayMonthAndYear_936fb181-d94d-4b57-9eeb-cc9dc845ff30" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_17019575-3f35-4127-bfdc-bf0ab80dc0dc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_fb306807-d5b8-4c69-a580-b2ef9f573fff" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_17019575-3f35-4127-bfdc-bf0ab80dc0dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_93fd44a2-4579-4363-a6ec-fe6ecef0c8a9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_fb306807-d5b8-4c69-a580-b2ef9f573fff" xlink:to="loc_us-gaap_DividendsCommonStockCash_93fd44a2-4579-4363-a6ec-fe6ecef0c8a9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_78b336c4-b231-4d8f-a6c4-2a7291ea4c81" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendPayableDateToBePaidDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_fb306807-d5b8-4c69-a580-b2ef9f573fff" xlink:to="loc_us-gaap_DividendPayableDateToBePaidDayMonthAndYear_78b336c4-b231-4d8f-a6c4-2a7291ea4c81" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_99320997-3720-4da2-8524-efc9b5ffe3d0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableDateOfRecordDayMonthAndYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_fb306807-d5b8-4c69-a580-b2ef9f573fff" xlink:to="loc_us-gaap_DividendsPayableDateOfRecordDayMonthAndYear_99320997-3720-4da2-8524-efc9b5ffe3d0" xlink:type="arc" order="4"/>
  </link:definitionLink>
</link:linkbase>
