Source : Webster's Revised Unabridged Dictionary (1913)

Satire \Sat"ire\ (?; in Eng. often ?; 277), n. [L. satira,
   satura, fr. satura (sc. lanx) a dish filled with various
   kinds of fruits, food composed of various ingredients, a
   mixture, a medley, fr. satur full of food, sated, fr. sat,
   satis, enough: cf. F. satire. See {Sate}, {Sad}, a., and cf.
   {Saturate}.]
   1. A composition, generally poetical, holding up vice or
      folly to reprobation; a keen or severe exposure of what in
      public or private morals deserves rebuke; an invective
      poem; as, the Satires of Juvenal.

   2. Keeness and severity of remark; caustic exposure to
      reprobation; trenchant wit; sarcasm.

   Syn: Lampoon; sarcasm; irony; ridicule; pasquinade;
        burlesque; wit; humor.

Source : WordNet®

satire
     n : witty language used to convey insults or scorn; "he used
         sarcasm to upset his opponent"; "irony is wasted on the
         stupid"; "Satire is a sort of glass, wherein beholders do
         generally discover everybody's face but their
         own"--Johathan Swift [syn: {sarcasm}, {irony}, {caustic
         remark}]