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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019df35a-37eb-78ee-a4fc-eaaf593201c4,g:efa27875-1e86-4d78-838f-005aa5518dc4-->
<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.pb.com/role/CoverPage" xlink:type="simple" xlink:href="pbi-20260505.xsd#CoverPage"/>
  <link:definitionLink xlink:role="http://www.pb.com/role/CoverPage" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntitiesTable_019df35a-37eb-74c9-9a89-b2cffcdd35ce" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntitiesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_EntitiesTable_019df35a-37eb-74c9-9a89-b2cffcdd35ce" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_019df35a-37eb-7fe4-a785-cd5db2ad94f5" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_dei_EntitiesTable_019df35a-37eb-74c9-9a89-b2cffcdd35ce" xlink:to="loc_us-gaap_StatementClassOfStockAxis_019df35a-37eb-7fe4-a785-cd5db2ad94f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019df35a-37eb-7fe4-a785-cd5db2ad94f5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019df35a-37eb-7fe4-a785-cd5db2ad94f5" xlink:to="loc_us-gaap_ClassOfStockDomain_019df35a-37eb-7fe4-a785-cd5db2ad94f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_019df35a-37eb-73e0-b466-59ef4a0b466b" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_019df35a-37eb-7fe4-a785-cd5db2ad94f5" xlink:to="loc_us-gaap_ClassOfStockDomain_019df35a-37eb-73e0-b466-59ef4a0b466b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_019df35a-37eb-70b5-af2c-acd4ca3d13e9" xlink:href="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019df35a-37eb-73e0-b466-59ef4a0b466b" xlink:to="loc_us-gaap_CommonStockMember_019df35a-37eb-70b5-af2c-acd4ca3d13e9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_pbi_A6.70Notesdue2043Member_019df35a-37eb-7141-b83c-08effba9460e" xlink:href="pbi-20260505.xsd#pbi_A6.70Notesdue2043Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_019df35a-37eb-73e0-b466-59ef4a0b466b" xlink:to="loc_pbi_A6.70Notesdue2043Member_019df35a-37eb-7141-b83c-08effba9460e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019df35a-37eb-77c0-91af-2ae51a4b1ab2" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentType"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_DocumentType_019df35a-37eb-77c0-91af-2ae51a4b1ab2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019df35a-37eb-7a29-b4c4-badaa2284099" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_DocumentPeriodEndDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_DocumentPeriodEndDate_019df35a-37eb-7a29-b4c4-badaa2284099" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019df35a-37eb-7b25-ac1f-4d6a786c7d4a" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityRegistrantName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_EntityRegistrantName_019df35a-37eb-7b25-ac1f-4d6a786c7d4a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019df35a-37eb-7e39-aa26-58c1b677f3bd" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019df35a-37eb-7e39-aa26-58c1b677f3bd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019df35a-37eb-7fde-a5ed-9d0eea146108" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityFileNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_EntityFileNumber_019df35a-37eb-7fde-a5ed-9d0eea146108" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019df35a-37eb-76a9-94e1-bfa1ccf954b4" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_EntityTaxIdentificationNumber_019df35a-37eb-76a9-94e1-bfa1ccf954b4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019df35a-37eb-7dc2-8eb7-1c2324e73142" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressAddressLine1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_EntityAddressAddressLine1_019df35a-37eb-7dc2-8eb7-1c2324e73142" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019df35a-37eb-7b57-9a0c-b6a9ae278465" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressCityOrTown"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_EntityAddressCityOrTown_019df35a-37eb-7b57-9a0c-b6a9ae278465" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019df35a-37eb-7a67-9234-1482e5be902b" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressStateOrProvince"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_EntityAddressStateOrProvince_019df35a-37eb-7a67-9234-1482e5be902b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019df35a-37eb-7f59-aa9d-aee1017571f7" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityAddressPostalZipCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_EntityAddressPostalZipCode_019df35a-37eb-7f59-aa9d-aee1017571f7" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019df35a-37eb-71c1-a9dd-e4221144cb02" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_CityAreaCode"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_CityAreaCode_019df35a-37eb-71c1-a9dd-e4221144cb02" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019df35a-37eb-760a-a93c-6d3c26638884" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_LocalPhoneNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_LocalPhoneNumber_019df35a-37eb-760a-a93c-6d3c26638884" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019df35a-37eb-76a5-a377-4386f925e7a3" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_WrittenCommunications"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_WrittenCommunications_019df35a-37eb-76a5-a377-4386f925e7a3" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019df35a-37eb-7148-a4af-152ebfaadac5" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SolicitingMaterial"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_SolicitingMaterial_019df35a-37eb-7148-a4af-152ebfaadac5" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019df35a-37eb-7d00-8931-2d41a48aa7e3" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_PreCommencementTenderOffer_019df35a-37eb-7d00-8931-2d41a48aa7e3" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019df35a-37eb-7f25-9256-114605e7bc00" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019df35a-37eb-7f25-9256-114605e7bc00" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019df35a-37eb-75b4-ae11-cca9e9cf1e31" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_Security12bTitle"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_Security12bTitle_019df35a-37eb-75b4-ae11-cca9e9cf1e31" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019df35a-37eb-7a02-b5d3-9b33d3bd56c2" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_TradingSymbol"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_TradingSymbol_019df35a-37eb-7a02-b5d3-9b33d3bd56c2" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019df35a-37eb-7867-aaba-d4449e2636d2" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_SecurityExchangeName"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_SecurityExchangeName_019df35a-37eb-7867-aaba-d4449e2636d2" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019df35a-37eb-7453-a45a-83afea5fc870" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_EntityEmergingGrowthCompany_019df35a-37eb-7453-a45a-83afea5fc870" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019df35a-37eb-783f-ac1e-feb783b6e100" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_EntityCentralIndexKey"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_EntityCentralIndexKey_019df35a-37eb-783f-ac1e-feb783b6e100" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019df35a-37eb-715a-b0b1-5917e6ced569" xlink:href="https://xbrl.sec.gov/dei/2024/dei-2024.xsd#dei_AmendmentFlag"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityInformationLineItems_019df35a-37eb-75f5-8bc0-0c84d8f07fed" xlink:to="loc_dei_AmendmentFlag_019df35a-37eb-715a-b0b1-5917e6ced569" xlink:type="arc" order="21"/>
  </link:definitionLink>
</link:linkbase>
