The Collaborative International Dictionary of English v.0.48:

Dispossess \Dis`pos*sess"\ (?; see Possess), v. t. [imp. & p.
   p. Dispossessed; p. pr. & vb. n. Dispossessing.] [Pref.
   dis- + possess: cf. F. d['e]poss['e]der.]
   To put out of possession; to deprive of the actual occupancy
   of, particularly of land or real estate; to disseize; to
   eject; -- usually followed by of before the thing taken away;
   as, to dispossess a king of his crown.
   [1913 Webster]

         Usurp the land, and dispossess the swain. --Goldsmith.
   [1913 Webster]

WordNet (r) 3.0 (2006):

dispossess
    v 1: deprive of the possession of real estate