lighten up meaning and definition

LIGHTEN UP verb

Definition of lighten up (verb)

1. make more cheerful
   • "the conversation lightened me up a bit"
   • synonyms: buoy up, lighten
   • antonym: weigh down
2. become more cheerful
   • "after a glass of wine, he lightened up a bit"
   • synonyms: buoy up, lighten
3. make lighter or brighter
   • "The paint will brighten the room"
   • synonyms: brighten, lighten
   • antonym: darken
4. become lighter
   • "The room lightened up"
   • synonyms: lighten
   • antonym: darken