Source : Webster's Revised Unabridged Dictionary (1913)

Ire \Ire\, n. [F., fr. L. ira.]
   Anger; wrath. [Poet.]

   Syn: Anger; passion; rage; fury. See {Anger}.

Source : WordNet®

ire
     n 1: a strong emotion; a feeling that is oriented toward some
          real or supposed grievance [syn: {anger}, {choler}]
     2: belligerence aroused by a real or supposed wrong
        (personified as one of the deadly sins) [syn: {wrath}, {anger},
         {ira}]