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.
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.
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.]