WordWeb Online

1. Make lighter or brighter
   "The paint will brighten the room"
   - lighten up, lighten
    
2. Become free from clouds or less cloudy; become brighter
   "The sky brightened after the storm"
   - clear up, clear, light up

Sounds like: Brighton

Derived forms: brightened, brightens, brightening

Type of: alter, change, modify

Antonym: darken

Encyclopedia: Brighten