Definition for CLACK

CLACK, n. [W. clec, a sharp noise, a crack, tale-bearing; cleca, clecian, clegyr, to clack, to crack, to tattle. See the Verb.]

  1. A sharp, abrupt sound continually repeated, such as is made by striking an object, or by bursting or cracking; continual talk; as, we do not wish to hear his clack; a common expression. Hence the word is used for the tongue, the instrument of clacking. – Butler. Prior.
  2. The instrument that strikes the hopper of a grist-mill, to move or shake it, for discharging the corn. And according to Johnson, a bell that rings when more corn is required to be put in. To clack wool, is to cut off the sheep's mark, which makes it weigh less, and yield less duty. [Not used, I believe, in America.]

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