Added 9 October 2026 discolouration noun Categories: Describing WordsActionsRare Words noun ! Definition from Wiktionary (CC BY-SA). More about discolouration at Wordnik → Where our words come from → Alternative spelling of discoloration. Related Words: discolorationstaincoloringcolorationcolourationcolouringcolorbleachingclearingcolourstainingdiscolouring Back to today's word