lighten up - definition and synonyms

phrasal verb
present tense
I/you/we/theylighten up
he/she/itlightens up
present participlelightening up
past tenselightened up
past participlelightened up
  1. 1
    [intransitive/transitive] same as lighten (sense 1)

    What can we do to lighten things up?

  2. 2
    [intransitive] informal used for telling someone to be less serious

    Oh, lighten up! It’s not a matter of life or death.

See also main entry: lighten