'Chatterer' definitions:

Definition of 'chatterer'

noun

An obnoxious and foolish and loquacious talker [syn: chatterer, babbler, prater, chatterbox, magpie, spouter]

noun

Passerine bird of New World tropics [syn: cotinga, chatterer]

From: GCIDE

Chatterer \Chat"ter*er\, n.
1. A prater; an idle talker. [1913 Webster]
2. (Zool.) A bird of the family Ampelid[ae] -- so called from its monotonous note. The Bohemion chatterer (Ampelis garrulus) inhabits the arctic regions of both continents. In America the cedar bird is a more common species. See Bohemian chatterer, and Cedar bird. [1913 Webster]