The Collaborative International Dictionary of English v.0.48:

Parsonage \Par"son*age\, n.
   1. (Eng. Eccl. Law) A certain portion of lands, tithes, and
      offerings, for the maintenance of the parson of a parish.
      [1913 Webster]

   2. The glebe and house, or the house only, owned by a parish
      or ecclesiastical society, and appropriated to the
      maintenance or use of the incumbent or settled pastor.
      [1913 Webster]

   3. Money paid for the support of a parson. [Scot.]
      [1913 Webster]

            What have I been paying stipend and teind, parsonage
            and vicarage, for?                    --Sir W.
                                                  Scott.
      [1913 Webster]

WordNet (r) 3.0 (2006):

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