Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “light up”

light up

verb phrasal verb with light  /lɑɪt/ (past tense and past participle lit  /lɪt/ or lighted) us  

(LOOK HAPPY)

to look happy: Rosa's face lit up when she saw the dog.
(Definition of light up from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of light up?
Add Cambridge dictionaries to your browser to your website

Definitions of “light up” in other dictionaries

Translations of “light up”

Word of the Day

nip

to press something quickly and quite hard between two objects, especially sharp objects such as teeth or nails

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More