1. The act of discoloring, or the state of being discolored; alteration of hue or appearance.
2. A discolored spot; a stain.
n 1: a soiled or discolored appearance; "the wine left a dark
stain" [syn: stain, discolouration]
2: the act of changing the natural color of something by making
it duller or dingier or unnatural or faded [syn: discolouration]