Definition of "clack" in English

noun

1. An abrupt, sharp sound, especially one made by two hard objects colliding repetitively; a sound midway between a click and a clunk.

2. Anything that causes a clacking noise, such as the clapper of a mill, or a clack valve.

3. Chatter; prattle.

4. (colloquial) The tongue.

verb

1. (intransitive) To make a sudden, sharp noise, or succession of noises; to click.

2. (transitive) To cause to make a sudden, sharp noise, or succession of noises; to click.

3. To chatter or babble; to utter rapidly without consideration.

4. (UK) To cut the sheep's mark off (wool), to make the wool weigh less and thus yield less duty.

5. Dated form of cluck.