Definition of 'darken'
- become dark or darker; "The sky darkened"
Antonyms: brighten lighten
- become or make darker; "The screen darkened"; "He darkened the colors by adding brown"
- tarnish or stain; "a scandal that darkened the family's good name"
- make dark or darker; "darken a room"
Antonyms: brighten lighten up lighten