light up (something)

idiom

Definition of light up (something)

1 : to provide light for (something) : to fill (something) with light light a room up Fireworks lit up the sky. often used figuratively A smile lights up her whole face.Her smile lights up the room.
2 : to cause (something) to burn She lit up a cigarette.

Comments on light up (something)

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

WORD OF THE DAY

miscellaneous remnants or debris

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Add Diction

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!