From WordNet (r) 3.0 (2006):
chat
n 1: an informal conversation [syn: chat, confab,
confabulation, schmooze, schmoose]
2: birds having a chattering call [syn: New World chat,
chat]
3: songbirds having a chattering call [syn: Old World chat,
chat]
v 1: talk socially without exchanging too much information; "the
men were sitting in the cafe and shooting the breeze" [syn:
chew the fat, shoot the breeze, chat, confabulate,
confab, chitchat, chit-chat, chatter, chaffer,
natter, gossip, jaw, claver, visit]