lighten up

/ˌlaɪtn əp/

/ˈlaɪtɪn əp/

Other forms: lightens up; lightened up; lightening up

Definitions of lighten up

1. verb

   make lighter or brighter
   synonyms: brighten, lighten

   type of:

   alter, change, modify

   cause to change; make different; cause a transformation
2. verb

   become lighter
   synonyms: lighten

   types:

   irradiate

   cast rays of light upon

   illume, illuminate, illumine, light, light up

   make lighter or brighter

   floodlight

   illuminate with floodlights

   spotlight

   illuminate with a spotlight, as in the theater

   type of:

   change

   undergo a change; become different in essence; losing one's or its original nature
3. verb

   make more cheerful
   synonyms: buoy up, lighten

   type of:

   cheer

   show approval or good wishes by shouting
4. verb

   become more cheerful
   synonyms: buoy up, lighten

   type of:

   cheer, cheer up, chirk up

   become cheerful