Source : Webster's Revised Unabridged Dictionary (1913)

Witty \Wit"ty\, a. [Compar. {Wittier}; superl. {Wittiest}.] [AS.
   witig, wittig. See {Wit}, n.]
   1. Possessed of wit; knowing; wise; skillful; judicious;
      clever; cunning. [Obs.] ``The deep-revolving witty
      Buckingham.'' --Shak.

   2. Especially, possessing wit or humor; good at repartee;
      droll; facetious; sometimes, sarcastic; as, a witty
      remark, poem, and the like. ``Honeycomb, who was so
      unmercifully witty upon the women.'' --Addison.

   Syn: Acute; smart; sharp; arch; keen; facetious; amusing;
        humorous; satirical; ironical; taunting.

Source : WordNet®

witty
     adj : combining clever conception and facetious expression; "his
           sermons were unpredictably witty and satirical as well
           as eloquent"
     [also: {wittiest}, {wittier}]

wittiest
     See {witty}