4  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  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. 
 
  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. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  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 
 
  We  heard  Mr.Hodson's  whip  clacking  on  the  ahoulders 
  of  the  poor  little  wretches.  --Thackeray. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Clack  \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.] 
 
  From  WordNet  r  1.6  [wn]: 
 
  clack 
  n  :  simple  non-return  valve  [syn:  {clack  valve}] 
  v  1:  make  a  rattling  sound  [syn:  {clatter},  {brattle}] 
  2:  make  a  clucking  sounds,  characteristic  of  hens  [syn:  {cluck}, 
  {click}] 
  3:  speak  (about  unimportant  matters)  rapidly  and  incessantly 
  [syn:  {chatter},  {piffle},  {palaver},  {prate},  {tittle-tattle}, 
  {twaddle},  {maunder},  {prattle},  {gibber},  {tattle},  {blabber}, 
  {gabble}] 

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