The Collaborative International Dictionary of English v.0.48:

Deanery \Dean"er*y\, n.; pl. Deaneries.
   1. The office or the revenue of a dean. See the Note under
      Benefice, n., 3.
      [1913 Webster]

   2. The residence of a dean. --Shak.
      [1913 Webster]

   3. The territorial jurisdiction of a dean.
      [1913 Webster]

            Each archdeaconry is divided into rural deaneries,
            and each deanery is divided into parishes.
                                                  --Blackstone.
      [1913 Webster]

WordNet (r) 3.0 (2006):

deanery
    n 1: the official residence of a dean
    2: the position or office of a dean [syn: deanship, deanery]

Moby Thesaurus II by Grady Ward, 1.0:

150 Moby Thesaurus words for "deanery":
   Dymaxion house, White House, abbacy, adobe house, aedileship,
   archbishopric, archdeaconry, archiepiscopacy, archiepiscopate,
   aristocracy, bishopdom, bishopric, building, canonicate, canonry,
   cardinalship, casa, chairmanship, chancellery, chancellorate,
   chancellorship, chaplaincy, chaplainship, chiefery, chiefry,
   chieftaincy, chieftainry, chieftainship, church house,
   clergy house, cliff dwelling, consulate, consulship, country house,
   country seat, curacy, dacha, deaconry, deaconship, deanship,
   dictatorship, dictature, directorship, dwelling house, edifice,
   embassy, emirate, episcopacy, episcopate, erection, fabric, farm,
   farmhouse, glebe, governorship, hall, headship, hegemony,
   hierarchy, house, houseboat, lake dwelling, leadership,
   living machine, lodge, lordship, magistracy, magistrateship,
   magistrature, manor house, manse, masterdom, mastership, mastery,
   mayoralty, mayorship, metropolitanate, metropolitanship, nobility,
   papacy, parsonage, pashadom, pashalic, pastorage, pastorate,
   pastorship, patriarchate, patriarchy, penthouse, pontificality,
   pontificate, popedom, popehood, popeship, prebend, prebendaryship,
   prefabricated house, prefectship, prefecture, prelacy, prelateship,
   prelature, premiership, presbyterate, presbytery, presidency,
   presidential palace, presidentship, primacy, prime-ministership,
   prime-ministry, princedom, princeship, principality, proconsulate,
   proconsulship, protectorate, protectorship, provostry, provostship,
   ranch house, rectorate, rectorship, rectory, regency, regentship,
   roof, ruling class, seigniory, seneschalship, seneschalsy,
   sheikhdom, sheriffalty, sheriffcy, sheriffdom, shrievalty,
   skyscraper, sod house, split-level, structure, supervisorship,
   suzerainship, suzerainty, town house, tribunate, vicarage,
   vicariate, vicarship, vizierate, viziership