Webster's Revised Unabridged Dictionary · 1913

Cluck

Cluck , intransitive verb

[Anglo-Saxon cloccian; compare Dutch klokken, German glucken, glucksen, LG. klukken, Danish klukke; all prob. of imitative origin.]

To make the noise, or utter the call, of a brooding hen. — Ray

Cluck , transitive verb

To call together, or call to follow, as a hen does her chickens.
She, poor hen, fond of no second brood, Has clucked three to the wars. — Shakespeare

Cluck , noun

1.
The call of a hen to her chickens.
2.
A click. See 3d Click, 2.