The Collaborative International Dictionary of English v.0.48:

Prejudice \Prej"u*dice\, v. t. [imp. & p. p. Prejudiced; p.
   pr. & vb. n. Prejudicing.] [Cf. F. pr['e]judicier. See
   Prejudice, n.]
   1. To cause to have prejudice; to prepossess with opinions
      formed without due knowledge or examination; to bias the
      mind of, by hasty and incorrect notions; to give an
      unreasonable bent to, as to one side or the other of a
      cause; as, to prejudice a critic or a juryman.
      [1913 Webster]

            Suffer not any beloved study to prejudice your mind
            so far as to despise all other learning. --I. Watts
      [1913 Webster]

   2. To obstruct or injure by prejudices, or by previous bias
      of the mind; hence, generally, to hurt; to damage; to
      injure; to impair; as, to prejudice a good cause.
      [1913 Webster]

            Seek how may prejudice the foe.       --Shak
      [1913 Webster]

WordNet (r) 3.0 (2006):

prejudiced
    adj 1: emanating from a person's emotions and prejudices
    2: being biased or having a belief or attitude formed
       beforehand; "a prejudiced judge" [syn: prejudiced,
       discriminatory] [ant: impartial, unprejudiced]

Moby Thesaurus II by Grady Ward, 1.0:

34 Moby Thesaurus words for "prejudiced":
   antiblack, biased, bigoted, chauvinistic, closed-minded, colored,
   doctrinaire, dogmatic, influenced, interested, intolerant,
   jaundiced, know-nothing, narrow-minded, nonobjective, one-sided,
   opinionated, parochial, partial, partisan, predisposed,
   prepossessed, racist, sexist, superpatriotic, swayed, tendentious,
   twisted, ultranationalist, undetached, undispassionate, unfair,
   warped, xenophobic