discolouration
1. [ noun ] a soiled or discolored appearance
Synonyms: stain discoloration
Examples:

"the wine left a dark stain"

Related terms: appearance iron_mold scorch mud_stain oil_stain tarnish bloodstain stain discolor
2. [ noun ] (color) the act of changing the natural color of something by making it duller or dingier or unnatural or faded
Synonyms: discoloration
Related terms: change_of_color discolor
Similar spelling:   discoloration
  discoloured
  discolourise
  discolorize
  discolorise