cause (somebody) to feel happier or more cheerful;
"She tried to cheer up the disappointed child when he failed to win the spelling bee"
- Try and cheer up a bit; life isn't that bad!
- Cheer up! I'm sure you'll feel better tomorrow.
- Cheer up! Things are not so bad as they seem.
- He took her to the ballet to cheer her up.
- Our teachers often cheer us up in class every day.
- cheer up 高兴起来