lighten
1. [ verb ] make more cheerful
Synonyms: buoy_up
Related terms: weigh_down cheer cheer
2. [ verb ] become brighter
Synonyms: brighten
Examples:

"The sky brightened"

Related terms: darken change
3. [ verb ] make more cheerful
Synonyms: buoy_up
Related terms: cheer
4. [ verb ] make lighter or brighter
Synonyms: brighten lighten_up
Examples:

"The paint will brighten the room"

Related terms: darken change brighten
5. [ verb ] become lighter
Synonyms: lighten_up
Examples:

"The room lightened up"

Related terms: change light irradiate
Similar spelling:   lightening
  lighten_up
  listen
  listener
  Lightner
  lighting
  listening
  listen_in
  lightning
  lightness
  light_unit
  Leighton
  light_time
  Lichtman