Definition of "clack"
noun:
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An abrupt, sharp sound, especially one made by two hard objects colliding repetitively; a clatter; in sound, midway between a click and a clunk.
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Anything that causes a clacking noise, such as the clapper of a mill, or a clack valve.
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Chatter; prattle.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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verb:
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To make such a sound.
from Wiktionary, Creative Commons Attribution/Share-Alike License -
To chatter or babble.
from Wiktionary, Creative Commons Attribution/Share-Alike License
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