The Collaborative International Dictionary of English v.0.48:

Forepossessed \Fore`pos*sessed"\ (f[=o]r`p[o^]z*z[e^]st" or
   f[=o]r`p[o^]s*s[e^]st"), a.
   1. Holding or held formerly in possession. [Obs.]
      [1913 Webster]

   2. Preoccupied; prepossessed; pre["e]ngaged. [Obs.]
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            Not extremely forepossessed with prejudice. --Bp.
                                                  Sanderson.
      [1913 Webster]