bleach

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To remove the color from, as by means of chemical agents or sunlight.
2. v. To make white or colorless.
3. v. To become white or colorless.
4. n. A chemical agent used for bleaching.
5. n. The act of bleaching.
6. n. The degree of bleaching obtained.

Century Dictionary and Cyclopedia

1. To make white or whiter by removing color; whiten; blanch; make pale; specifically, to whiten (as linen, etc.) by washing and exposure to the action of the air and sunlight, or by chemical preparations. See bleaching.
2. Synonyms Blanch, etc. See whiten.
3. To become white in any manner; become pale or colorless.
4. To become morally pure.
5. Pale.
6. Bleak.
7. n. A disease of the skin. Holland, tr. of Pliny.
8. n. An act of bleaching; exposure to the sun or other bleaching agency or influence.
9. n. Blacking; any substance used for blacking.
10. n. An abbreviation of ‘bleaching-powder,’ or chlorid of lime.

Wiktionary

1. adj. archaic Pale; bleak.
2. n. An act of bleaching; exposure to the sun.
3. n. A disease of the skin.
4. v. transitive To treat with bleach, especially so as to whiten (fabric, paper, etc) or lighten (hair).
5. v. intransitive, biology to lose color due to stress-induced expulsion of symbiotic unicellular algae.
6. n. uncountable A chemical, such as sodium hypochlorite or hydrogen peroxide, or a preparation of such a chemical, used for disinfecting or whitening.
7. n. countable A variety of bleach.

GNU Webster's 1913

1. v. To make white, or whiter; to remove the color, or stains, from; to blanch; to whiten.
2. v. To grow white or lose color; to whiten.

WordNet 3.0

1. n. the act of whitening something by bleaching it (exposing it to sunlight or using a chemical bleaching agent)
2. n. an agent that makes things white or colorless
3. v. make whiter or lighter
4. n. the whiteness that results from removing the color from something
5. v. remove color from