NOUN (1)

1. the sound made by corvine birds;


VERB (1)

1. utter a cry, characteristic of crows, rooks, or ravens;

The Collaborative International Dictionary of English v.0.48:

Caw \Caw\ (k[add]), v. i. [imp. & p. p. Cawed (k[add]d); p.
   pr. & vb. n. Cawing.] [Imitative. [root]22 Cf. Chough.]
   To cry like a crow, rook, or raven.
   [1913 Webster]

         Rising and cawing at the gun's report.   --Shak.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Caw \Caw\, n.
   The cry made by the crow, rook, or raven.
   [1913 Webster]

WordNet (r) 3.0 (2006):

caw
    n 1: the sound made by corvine birds
    v 1: utter a cry, characteristic of crows, rooks, or ravens