Definition of: clack

(klak) v.t.
1. To strike together so as to make a cracking sound; clap; rattle.
2. To utter heedlessly; babble.
—v.i.
3. To make a rattling, clapping, or cracking sound.
4. To talk hastily or continually; chatter.
5. To cluck or cackle, as a hen.
—noun
1. A sharp, short, clapping sound, or something producing it.
2. Continual and confused talk; chatter.
3. Slang The tongue: Hold your clack; hence, a gossip. [Imit.]
—clack′er noun