What is the meaning of Cluck?

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.

A setting hen.

To make low clicking sounds (refers to hens).

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

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

To suffer withdrawal from heroin.

Source: wiktionary.org