light up

phrasal verb

Definition of light up

1 of a light : to become lit : to begin shining All of the lights on the display suddenly lit up. often used figuratively to express interest or pleasureHis eyes/face lit up when she walked in the room.
2 informal, of a telephone : to show a light indicating that someone is calling When the DJ announced a contest, the phones lit up.
3 informal : to light a cigarette I can't wait to light up after work.

Learn More about light up

Statistics for light up

Cite this Entry

“Light up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/light%20up. Accessed 27 Nov. 2020.

Comments on light up

What made you want to look up light up? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

A Thanksgiving Word Quiz

  • a traditional thanksgiving dinner
  • November comes from a word for which of the following numbers?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Dictionary Devil

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!