Clack definition | Dictionary.com

clack

[klak]

–verb (used without object)

1.	to make a quick, sharp sound, or a succession of such sounds, as by striking or cracking: The loom clacked busily under her expert hands.

2.	to talk rapidly and continually or with sharpness and abruptness; chatter.

3.	to cluck or cackle.

–verb (used with object)

4.	to utter by clacking.

5.	to cause to clack: He clacked the cup against the saucer.

–noun

6.	a clacking sound.

7.	something that clacks, as a rattle.

8.	rapid, continual talk; chatter.

Origin:
1200–50; ME clacken; imit.

Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
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clack   (klāk) Pronunciation Key
v.   clacked, clack·ing, clacks

v.   intr.

To make an abrupt, sharp sound, as in the collision of two hard surfaces.
To chatter thoughtlessly or at length.
To cackle or cluck, as a hen.

v. tr.
To cause to make an abrupt, sharp sound.
n.

A clacking sound: the clack of an old-fashioned typewriter.
Something that makes a clacking sound.
Thoughtless, prolonged talk; chatter.

[Middle English clakken, from Old Norse klaka, of imitative origin.]
clack'er n.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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clack

c.1250, from O.N. klaka "to chatter," of echoic origin.

Online Etymology Dictionary, © 2001 Douglas Harper
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clack
noun
1.	a sharp abrupt noise as if two objects hit together; may be repeated
2.	a simple valve with a hinge on one side; allows fluid to flow in only one direction [syn: clack valve]
verb
1.	make a rattling sound; "clattering dishes" [syn: clatter]
2.	make a clucking sounds, characteristic of hens [syn: cluck]
3.	speak (about unimportant matters) rapidly and incessantly

WordNet® 3.0, © 2006 by Princeton University.
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Clack

Clack\, v. i. [imp. & p. p. Clacked; p. pr. & vb. n. Clacking.] [Prob. of imitative origin; cf. F. claquer to clap, crack, D. klakken, MHG. klac crack, Ir. clagaim I make a noise, ring. Cf. Clack, n., Clatter, Click.]

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.

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.

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Clack

Clack\, v. t. 1. To cause to make a sudden, sharp noise, or succession of noises; to click.

2. To utter rapidly and inconsiderately. --Feltham.

To clack wool, to cut off the sheep's mark, in order to make the wool weigh less and thus yield less duty. [Eng.]

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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Clack

Clack\, n. [Cf. F. claque a slap or smack, MHG. klac crack, W. clec crack, gossip. See Clack, v. t.]

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.

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