Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “lighten up”

lighten up

informal phrasal verb with lighten     /ˈlaɪ.tən/ US  /-t̬ən/ verb
to become more relaxed and less serious : Oh, lighten up! I was only joking ! I wish she'd lighten up a bit .Calming and relaxing
(Definition of lighten up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of lighten up

Browse related topics

You are looking at an entry to do with Calming and relaxing, but you might be interested in these topics from the Calm and quiet topic area:

Definitions of “lighten up” in other dictionaries

Translations of “lighten up”

Word of the Day

best man

a male friend or relation of the bridegroom who stands with him and helps him during a marriage ceremony

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