The Collaborative International Dictionary of English v.0.48:

Rectory \Rec"to*ry\ (-t?*r?), n.; pl. Rectories (-r?z). [Cf.
   OF. rectorie or rectorerie, LL. rectoria.]
   1. The province of a rector; a parish church, parsonage, or
      spiritual living, with all its rights, tithes, and glebes.
      [1913 Webster]

   2. A rector's mansion; a parsonage house.
      [1913 Webster]

WordNet (r) 3.0 (2006):

rectory
    n 1: an official residence provided by a church for its parson
         or vicar or rector [syn: parsonage, vicarage,
         rectory]

Moby Thesaurus II by Grady Ward, 1.0:

53 Moby Thesaurus words for "rectory":
   Dymaxion house, White House, adobe house, advowson, benefice,
   building, care of souls, casa, charge, church house, clergy house,
   cliff dwelling, consulate, country house, country seat, curacy,
   cure, dacha, deanery, dwelling house, edifice, embassy, erection,
   fabric, farm, farmhouse, glebe, hall, house, houseboat, incumbency,
   lake dwelling, living, living machine, lodge, manor house, manse,
   parsonage, pastorage, pastorate, penthouse, prefabricated house,
   prelacy, presbytery, presidential palace, ranch house, roof,
   skyscraper, sod house, split-level, structure, town house,
   vicarage



Bouvier's Law Dictionary, Revised 6th Ed (1856):

RECTORY, Eng. law. Corporeal real property, consisting of a church, glebe
lands and tithes. 1 Chit. Pr. 163.