bleach

Short definition from Wiktionary

Noun

1. 1
   A chemical, such as sodium hypochlorite or hydrogen peroxide, or a preparation of such a chemical, used for disinfecting or whitening.
2. 2
   A variety of bleach.
3. 3
   An act of bleaching; exposure to the sun.
4. 4
   A disease of the skin characterized by hypopigmentation and itching, believed in the 17th century to be a form of leprosy.

Verb

1. 1
   To treat with bleach, especially so as to whiten (fabric, paper, etc.) or lighten (hair).
2. 2
   To be whitened or lightened (by the sun, for example).
3. 3
   To lose color due to stress-induced expulsion of symbiotic unicellular algae.
4. 4
   To make meaningless; to divest of meaning; to make empty.

Adjective

1. 1
   Pale; bleak.