The Collaborative International Dictionary of English v.0.48:

Prejudicate \Pre*ju"di*cate\, a. [L. praejudicatus, p. p. of
   praejudicare to prejudge; prae before + judicare to judge.
   See Judge.]
   1. Formed before due examination. "Ignorance and prejudicate
      opinions." --Jer. Taylor.
      [1913 Webster]

   2. Biased by opinions formed prematurely; prejudiced.
      "Prejudicate readers." --Sir T. Browne.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prejudicate \Pre*ju"di*cate\, v. t. [imp. & p. p.
   Prejudicated; p. pr. & vb. n. Prejudicating.] [Cf.
   Prejudge.]
   To determine beforehand, especially to disadvantage; to
   prejudge.
   [1913 Webster]

         Our dearest friend
         Prejudicates the business.               --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Prejudicate \Pre*ju"di*cate\, v. i.
   To prejudge. --Sir P. Sidney.
   [1913 Webster]