The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

         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.
   [1913 Webster]

         Immortal liberty, whose look sublime
         Hath bleached the tyrant's cheek in every varying
         clime.                                   --Smollett.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bleach \Bleach\, v. i.
   To grow white or lose color; to whiten.
   [1913 Webster]

WordNet (r) 3.0 (2006):

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, bleach, blanching agent, whitener]
    3: the act of whitening something by bleaching it (exposing it
       to sunlight or using a chemical bleaching agent)
    v 1: remove color from; "The sun bleached the red shirt" [syn:
         bleach, bleach out, decolor, decolour,
         decolorize, decolourize, decolorise, decolourise,
         discolorize, discolourise, discolorise]
    2: make whiter or lighter; "bleach the laundry"