Source : Webster's Revised Unabridged Dictionary (1913)

Prepossess \Pre`pos*sess"\, v. t. [imp. & p. p. {Prepossessed};
   p. pr. & vb. n. {Prepossessing}.]
   1. To preoccupy, as ground or land; to take previous
      possession of. --Dryden.

   2. To preoccupy, as the mind or heart, so as to preclude
      other things; hence, to bias or prejudice; to give a
      previous inclination to, for or against anything; esp., to
      induce a favorable opinion beforehand, or at the outset.

            It created him enemies, and prepossessed the lord
            general.                              --Evelyn.

Source : WordNet®

prepossess
     v 1: possess beforehand
     2: cause to be preoccupied; "The idea of his failure
        prepossesses him"
     3: make a positive impression (on someone) beforehand; "A
        prepossessing appearance"
     4: influence (somebody's) opinion in advance [syn: {prejudice}]