light up - definition and synonyms

phrasal verb
present tense
I/you/we/theylight up
he/she/itlights up
present participlelighting up
past tenselit up
past participlelit up
  1. 1
    [intransitive/transitive] informal to light a cigarette
  2. 2
    [transitive] same as light3 (sense 2)

    They could see the airport lit up far below them.

  3. 3
    [intransitive] to become bright or light

    There was a flash of lightning and the sky lit up.

  4. 4
    [intransitive] if a light lights up, it starts to shine
  5. 5
    [intransitive/transitive] if someone’s face or eyes light up, they express a strong emotion, usually happiness or excitement

    Antony’s eyes lit up when Keiko walked into the room.

See also main entry: light