WordReference Random House Learner's Dictionary of American English © 2026
clack /klæk/USA pronunciation   v. 
  1. to make a quick sharp sound, as by striking or cracking: [no object]I could hear her high heels clacking on the marble floor.[~ + object]She clacked the pieces of the toy together.

n. [countable]
  1. a clacking sound.

WordReference Random House Unabridged Dictionary of American English © 2026
clack  (klak),USA pronunciation v.i. 
  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.

v.t. 
  1. to utter by clacking.
  2. to cause to clack:He clacked the cup against the saucer.

n. 
  1. a clacking sound.
  2. something that clacks, as a rattle.
  3. rapid, continual talk;
    chatter.
  • 1200–50; Middle English clacken; imitative

Collins Concise English Dictionary © HarperCollins Publishers::
clack /klæk/ vb
  1. to make or cause to make a sound like that of two pieces of wood hitting each other
  2. (intransitive) to jabber
  3. a less common word for cluck
 n
  1. a short sharp sound
  2. chatter
  3. Also called: clack valve a simple nonreturn valve using either a hinged flap or a ball
Etymology: 13th Century: probably from Old Norse klaka to twitter, of imitative origin
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'clacking' also found in these entries (note: many are not synonyms or translations):
clack

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