The sound made by a hen, especially when brooding, or calling her chicks.

Any sound similar to this.

A kind of tongue click used to urge on a horse.

(intransitive) To make such a sound.

(transitive) To cause (the tongue) to make a clicking sound.

To call together, or call to follow, as a hen does her chickens.

(Britain, drug slang) to suffer withdrawal from heroin.