1. past tense and past participle of decolorise; to remove color from something or cause it to lose color
Usage: British spelling; American equivalent is 'decolorized'; often used in chemistry and textile contexts

Examples

• The sun had decolorised the old curtains over many years.
• The chemical treatment decolorised the fabric completely.
• Bleach decolorised the stain but also damaged the material.
• The dye was decolorised by prolonged exposure to light.
• The solution decolorised the sample, making it transparent.