1. Make more cheerful
   - lighten, buoy up 
2. Become more cheerful
   "after a glass of wine, he lightened up a bit"
   - lighten, buoy up 
3. Make lighter or brighter
   - brighten, lighten 
4. Become lighter
   "The room lightened up"
   - lighten

Derived forms: lightens up, lightened up, lightening up

Type of: alter, change, cheer, cheer up, chirk up, modify

• indifferently
• indigen
• indigence
• indigene
• slanderous
• slanderously
• slang
• slang expression
• slang term
• slangily
• slanginess
• slanguage
• slangy
• slant
• slant-eye
• slanted
• slanting
• slantingly
• slantways
• slantwise
• slap
• slap on
• slap together
• slap-bang
• slap-up