light up

phrasal verb

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 pleasure
His 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.

Examples of light up in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Three-dimensional art sculptures and installations take over the space outside Orlando’s stadium while fireworks and pyrotechnics light up the night sky. Patrick Connolly, The Orlando Sentinel, 27 June 2025 In one composite released Monday, bright pink clouds of gas and dust light up the Trifid and Lagoon nebulas, located several thousand light-years away from Earth. Denise Chow, NBC news, 23 June 2025 Cole Anthony can light up a scoreboard at times, but he’s been inconsistent offensively and is nowhere close to the defender second-year guard Anthony Black is. Josh Robbins, New York Times, 28 Apr. 2025 Not against this, an opponent able to lock down on defense, light up on offense. Ira Winderman, Sun Sentinel, 26 Apr. 2025 See All Example Sentences for light up

Cite this Entry

“Light up.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/light%20up. Accessed 1 Jul. 2025.

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