[1] : The Collaborative International Dictionary of English v.0.48

extinguish \extin"guish\ e^ksti^ng"gwi^sh, v. t.
   imp.  p. p. extinguishede^ksti^ng"gwi^sht; p
   pr.  vb. n. extinguishing. l. extinguere, exstinguere;
   ex out + stinguere to quench. see distinguish, finish.
   1. to quench; to put out, as a light or fire; to stifle; to
      cause to die out; to put an end to; to destroy; as, to
      extinguish a flame, or life, or love, or hope, a pretense
      or a right.
      1913 webster

            a light which the fierce winds have no power to
            extinguish.                           --prescott.
      1913 webster

            this extinguishes my right to the reversion.
                                                  --blackstone.
      1913 webster

   2. to obscure; to eclipse, as by superior splendor.
      1913 webster

            natural graces that extinguish art.   --shak
      .
      1913 webster
see also:
extinguished extinguishing distinguish finish 

[2] : WordNet (r) 2.0

extinguish
     v 1: put an end to; kill; "the nazis snuffed out the life of many
          jewish children" syn: snuff out
     2: put out, as of fires, flames, or lights; "too big to be
        extinguished at once, the forest fires at best could be
        contained"; "quench the flames"; "snuff out the candles"
        syn: snuff out, blow out, quench ant: ignite
     3: extinguish by crushing; "stub out your cigar" syn: stub
        out, crush out, press out
     4: kill in large numbers; "the plague wiped out an entire
        population" syn: eliminate, annihilate, eradicate,
        wipe out, decimate, carry off
see also:
snuff out blow out quench ignite stub out crush out 
press out eliminate annihilate eradicate wipe out 
decimate carry off 

[3] : Moby Thesaurus II by Grady Ward, 1.0

143 moby thesaurus words for "extinguish":
   ko, abate, abolish, abscind, adumbrate, amputate, annihilate,
   asphyxiate, ban, banish, bar, blot out, blow out, bob, bottle up,
   call off, cancel, censor, choke, choke off, clamp down on, clip,
   complete, cork, cork up, crack down on, crop, crush, cull, cut,
   cut away, cut off, cut out, damp, damp down, delete, destroy, dim,
   dispose of, do away with, dock, douse, drop the curtain, drown,
   eclipse, eliminate, end off, enucleate, eradicate, except, excise,
   exclude, expunge, exterminate, extirpate, fake out, finalize,
   finish, fold up, gag, get it over, get over with, get through with,
   give the quietus, hold down, isolate, jump on, kayo, keep down,
   keep under, kibosh, kill, knock off, knock out, lop, mutilate,
   muzzle, nip, nullify, obliterate, obscure, out, outdo, overshadow,
   pare, peel, perfect, pick out, polish off, pour water on, prune,
   put down, put out, put paid to, put to shame, quash, quell, quench,
   remove, repress, root out, rule out, scrag, set apart, set aside,
   shave, shear, shoot down, show up, shut down on, silence,
   sit down on, sit on, slack, smash, smother, snuff, snuff out,
   squash, squelch, stamp out, stanch, stifle, strangle, strike off,
   strip, strip off, stultify, subdue, suffocate, suppress, take off,
   take out, throttle, trample out, trample underfoot, truncate,
   turn off, turn out, uproot, wipe, wipe out, zap

Extinguish >> E Words
Extinguish, definition of term: Extinguish
extinguish_pag1.html

Fire Extinguish >> F Words
Fire Extinguish, definition of term: Fire Extinguish
fire+extinguish_pag1.html