The Collaborative International Dictionary of English v.0.48:

Manse \Manse\, n. [LL. mansa, mansus, mansum, a farm, fr. L.
   manere, mansum, to stay, dwell. See Mansion, Manor.]
   1. A dwelling house, generally with land attached.
      [1913 Webster]

   2. The parsonage; a clergyman's house. [Scot.]
      [1913 Webster]

   Capital manse, the manor house, or lord's court.
      [1913 Webster]

WordNet (r) 3.0 (2006):

manse
    n 1: a large and imposing house [syn: mansion, mansion
         house, manse, hall, residence]
    2: the residence of a clergyman (especially a Presbyterian
       clergyman)