Source : Webster's Revised Unabridged Dictionary (1913)

Quench \Quench\, v. t. [imp. & p. p. {Quenched}; p. pr. & vb. n.
   {Quenching}.] [OE. quenchen, AS. cwencan in [=a]cwencan, to
   extinguish utterly, causative of cwincan, [=a]cwincan, to
   decrease, disappear; cf. AS. cw[=i]nan, [=a]cw[=i]nan, to
   waste or dwindle away.]
   1. To extinguish; to overwhelm; to make an end of; -- said of
      flame and fire, of things burning, and figuratively of
      sensations and emotions; as, to quench flame; to quench a
      candle; to quench thirst, love, hate, etc.

            Ere our blood shall quench that fire. --Shak.

            The supposition of the lady's death Will quench the
            wonder of her infamy.                 --Shak.

   2. To cool suddenly, as heated steel, in tempering.

   Syn: To extinguish; still; stifle; allay; cool; check.

Quench \Quench\, v. i.
   To become extinguished; to go out; to become calm or cool.
   [R.]

         Dost thou think in time She will not quench! --Shak.

Source : WordNet®

quench
     v 1: satisfy (thirst); "The cold water quenched his thirst" [syn:
           {slake}, {allay}, {assuage}]
     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}, {extinguish}] [ant: {ignite}]
     3: electronics: suppress (sparking) when the current is cut off
        in an inductive circuit, or suppress (an oscillation or
        discharge) in a component or device
     4: suppress or crush completely; "squelch any sign of dissent";
        "quench a rebellion" [syn: {squelch}, {quell}]
     5: reduce the degree of (luminescence or phosphorescence) in
        (excited molecules or a material) by adding a suitable
        substance
     6: cool by plunging into cold water; "quench metal"