'Discolor' definitions:

Definition of 'discolor'

(from WordNet)
verb
Lose color or turn colorless; "The painting discolored" [ant: color, color in, colorise, colorize, colour, colour in, colourise, colourize]
verb
Cause to lose or change color; "The detergent discolored my shirts"
verb
Change color, often in an undesired manner; "The shirts discolored" [syn: discolor, discolour, colour, color]

Definition of 'Discolor'

From: GCIDE
  • Discolor \Dis*col"or\, v. t. [imp. & p. p. Discolored; p. pr. & vb. n. Discoloring.] [OE. descolouren, OF. descolorer, F. d['e]colorer, fr. L. dis- + cololare, coloratum, to color, color color. See Color.] [Written also discolour.]
  • 1. To alter the natural hue or color of; to change to a different color; to stain; to tinge; as, a drop of wine will discolor water; silver is discolored by sea water. [1913 Webster]
  • 2. To alter the true complexion or appearance of; to put a false hue upon. [1913 Webster]
  • To discolor all your ideas. --Watts. [1913 Webster]