phrasal verb. When you cheer up or when something cheers you up, you stop feeling depressed and become more cheerful. I think he misses her terribly. You might cheer him up.

What does it mean to cheer up?

: to become happier They cheered up at the mention of her name. Cheer up—things will get better!

What is another way of saying cheer up?

Cheer-up synonyms

To become more lively or enthusiastic. ... In this page you can discover 18 synonyms, antonyms, idiomatic expressions, and related words for cheer-up, like: improve in mood, inspirit, enliven, take-heart, perk up, chirk-up, jolly along, jolly up, be comforted, comfort and improve in outlook.