Source : Webster's Revised Unabridged Dictionary (1913)

Jester \Jest"er\, n. [Cf. {Gestour}.]
   1. A buffoon; a merry-andrew; a court fool.

            This . . . was Yorick's skull, the king's jester.
                                                  --Shak.

            Dressed in the motley garb that jesters wear.
                                                  --Longfellow.

   2. A person addicted to jesting, or to indulgence in light
      and amusing talk.

            He ambled up and down With shallow jesters. --Shak.

Source : WordNet®

jester
     n : a professional clown employed to entertain a king or
         nobleman in the middle ages [syn: {fool}, {motley fool}]