Source : Webster's Revised Unabridged Dictionary (1913)

Chant \Chant\, v. t. [imp. & p. p. {Chanted}; p. pr. & vb. n.
   {Chanting}.] [F. chanter, fr. L. cantare, intens. of canere
   to sing. Cf. {Cant} affected speaking, and see {Hen}.]
   1. To utter with a melodious voice; to sing.

            The cheerful birds . . . do chant sweet music.
                                                  --Spenser.

   2. To celebrate in song.

            The poets chant in the theaters.      --Bramhall.

   3. (Mus.) To sing or recite after the manner of a chant, or
      to a tune called a chant.

Chant \Chant\, v. i.
   1. To make melody with the voice; to sing. ``Chant to the
      sound of the viol.'' --Amos vi. 5.

   2. (Mus.) To sing, as in reciting a chant.

   {To chant (or chaunt)} {horses}, to sing their praise; to
      overpraise; to cheat in selling. See {Chaunter}.
      --Thackeray.

Chant \Chant\, n.[F. chant, fr. L. cantus singing, song, fr.
   canere to sing. See {Chant}, v. t.]
   1. Song; melody.

   2. (Mus.) A short and simple melody, divided into two parts
      by double bars, to which unmetrical psalms, etc., are sung
      or recited. It is the most ancient form of choral music.

   3. A psalm, etc., arranged for chanting.

   4. Twang; manner of speaking; a canting tone. [R.]

            His strange face, his strange chant.  --Macaulay.

   {Ambrosian chant}, See under {Ambrosian}.

   {Chant royal} [F.], in old French poetry, a poem containing
      five strophes of eleven lines each, and a concluding
      stanza. -- each of these six parts ending with a common
      refrain.

   {Gregorian chant}. See under {Gregorian}.

Source : WordNet®

chant
     n : a repetitive song in which as many syllables as necessary
         are assigned to a single tone

chant
     v 1: recite with musical intonation; recite as a chant or a
          psalm; "The rabbi chanted a prayer" [syn: {intone}, {intonate},
           {cantillate}]
     2: utter monotonously and repetitively and rhythmically; "The
        students chanted the same slogan over and over again"
        [syn: {tone}, {intone}]