Source : Webster's Revised Unabridged Dictionary (1913)

Crow \Crow\ (kr?), v. i. [imp. {Crew} (kr?) or {Crowed} (kr?d);
   p. p. {Crowed} ({Crown} (kr?n), Obs.); p. pr. & vb. n.
   {Crowing}.] [AS. cr?wan; akin to D. kraijen, G. kr?hen, cf.
   Lith. groti to croak. [root]24. Cf. {Crake}.]
   1. To make the shrill sound characteristic of a cock, either
      in joy, gayety, or defiance. ``The cock had crown.''
      --Bayron.

            The morning cock crew loud.           --Shak.

   2. To shout in exultation or defiance; to brag.

   3. To utter a sound expressive of joy or pleasure.

            The sweetest little maid, That ever crowed for
            kisses.                               --Tennyson.

   {To crow over}, to exult over a vanquished antagonist.

            Sennacherib crowing over poor Jerusalem. --Bp. Hall.

Source : WordNet®

crowing
     adj : exhibiting self-importance; "big talk" [syn: {boastful}, {braggart(a)},
            {bragging(a)}, {braggy}, {big}, {cock-a-hoop}, {self-aggrandizing},
            {self-aggrandising}]
     n : an instance of boastful talk; "his brag is worse than his
         fight"; "whenever he won we were exposed to his
         gasconade" [syn: {brag}, {bragging}, {crow}, {vaporing},
         {line-shooting}, {gasconade}]