Source : Webster's Revised Unabridged Dictionary (1913)

Choler \Chol"er\, n. [OE. coler, F. col[`e]re anger, L. cholera
   a bilious complaint, fr. Gr. ? cholera, fr. ?, ?, bile. See
   {Gall}, and cf. {Cholera}.]
   1. The bile; -- formerly supposed to be the seat and cause of
      irascibility. [Obs.]

            His [Richard Hooker's] complexion . . . was
            sanguine, with a mixture of choler; and yet his
            motion was slow.                      --I. Warton.

   2. Irritation of the passions; anger; wrath.

            He is rash and very sudden in choler. --Shak.

Source : WordNet®

choler
     n 1: an irritable petulant feeling [syn: {irritability}, {crossness},
           {fretfulness}, {fussiness}, {peevishness}, {petulance}]
     2: a strong emotion; a feeling that is oriented toward some
        real or supposed grievance [syn: {anger}, {ire}]
     3: a humor that was once believed to be secreted by the liver
        and to cause irritability and anger [syn: {yellow bile}]