clack

Clack \Clack\, v. t.
   1. To cause to make a sudden, sharp noise, or succession of
      noises; to click.
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   2. To utter rapidly and inconsiderately. --Feltham.
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   To clack wool, to cut off the sheep's mark, in order to
      make the wool weigh less and thus yield less duty. [Eng.]
      [1913 Webster]See also:
To clack wool 

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.
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            We heard Mr.Hodson's whip clacking on the ahoulders
            of the poor little wretches.          --Thackeray.
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   2. To utter words rapidly and continually, or with
      abruptness; to let the tongue run.
      [1913 Webster]See also:
Clacked Clacking Clack Clatter Click 

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.
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   2. Anything that causes a clacking noise, as the clapper of a
      mill, or a clack valve.
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   3. Continual or importunate talk; prattle; prating.
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            Whose chief intent is to vaunt his spiritual clack.
                                                  --South.
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   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.
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   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.
      [1913 Webster]See also:
Clack Clack box Clack dish Clack door Clack valve