verb
- to change or spoil the color of something; to make something lose its original color
Usage: British spelling (American: discolors); third person singular present tense
Examples
- Rust discolours the metal surface over time.
- The sun discolours the fabric if it is left exposed for too long.
- Coffee discolours teeth with regular consumption.
- Moisture discolours the old painting.
- Age discolours the pages of the antique book.