Clack

v. i.	1.	To make a sudden, sharp noise, or a succesion of such noises, as by striking an object, or by collision of parts; to rattle; to click. [imp. & p. p. Clacked ; p. pr. & vb. n. Clacking.] We heard Mr.Hodson's whip clacking on the ahoulders of the poor little wretches. - Thackeray.
	2.	To utter words rapidly and continually, or with abruptness; to let the tongue run.
v. t.	1.	To cause to make a sudden, sharp noise, or succession of noises; to click.
	2.	To utter rapidly and inconsiderately. To clack wool to cut off the sheep's mark, in order to make the wool weigh less and thus yield less duty
n.	1.	A sharp, abrupt noise, or succession of noises, made by striking an object.
	2.	Anything that causes a clacking noise, as the clapper of a mill, or a clack valve.
	3.	Continual or importunate talk; prattle; prating. Whose chief intent is to vaunt his spiritual clack. - South. Clack box (Mach.) the box or chamber in which a clack valve works. Clack dish a dish with a movable lid, formerly carried by beggars, who clacked the lid to attract notice. - Shak. Clack door (Mining) removable cover of the opening through which access is had to a pump valve. Clack valve (Mach.) a valve; esp. one hinged at one edge, which, when raised from its seat, falls with a clacking sound.

Noun	1.	clack - a sharp abrupt noise as if two objects hit together; may be repeated Synonyms: clap
	2.	clack - a simple valve with a hinge on one side; allows fluid to flow in only one direction Synonyms: clack valve, clapper valve
Verb	1.	clack - make a rattling sound; "clattering dishes" Synonyms: brattle, clatter
	2.	clack - make a clucking sounds, characteristic of hens Synonyms: cluck, click
	3.	clack - speak (about unimportant matters) rapidly and incessantly Synonyms: blabber, gabble, gibber, palaver, piffle, prate, prattle, tattle, tittle-tattle, twaddle, blab, maunder, chatter

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