Source : Webster's Revised Unabridged Dictionary (1913)

Bleach \Bleach\, v. i.
   To grow white or lose color; to whiten.

Bleach \Bleach\, v. t. [imp. & p. p. {Bleached}; p. pr. & vb. n.
   {Bleaching}.] [OE. blakien, blechen, v. t. & v. i., AS.
   bl[=a]cian, bl?can, to grow pale; akin to Icel. bleikja, Sw.
   bleka, Dan. blege, D. bleeken, G. bleichen, AS. bl[=a]c pale.
   See {Bleak}, a.]
   To make white, or whiter; to remove the color, or stains,
   from; to blanch; to whiten.

         The destruction of the coloring matters attached to the
         bodies to be bleached is effected either by the action
         of the air and light, of chlorine, or of sulphurous
         acid.                                    --Ure.

         Immortal liberty, whose look sublime Hath bleached the
         tyrant's cheek in every varying clime.   --Smollett.

Source : WordNet®

bleach
     n 1: the whiteness that results from removing the color from
          something; "a complete bleach usually requires several
          applications"
     2: an agent that makes things white or colorless [syn: {bleaching
        agent}, {blanching agent}, {whitener}]
     3: the act of whitening something by bleaching it (exposing it
        to sunlight or using a chemical bleaching agent)

bleach
     v 1: remove color from; "The sun bleached the red shirt" [syn: {bleach
          out}, {decolor}, {decolour}, {decolorize}, {decolourize},
           {decolorise}, {decolourise}, {discolorize}, {discolourise},
           {discolorise}]
     2: make whiter or lighter; "bleach the laundry"