1 [intransitive and transitive]
to shout as a way of showing happiness, praise, approval, or support of someone or something:
Everybody cheered when the firemen arrived.
The audience was shouting and cheering.
The spectators cheered him wildly.
to make someone feel more hopeful when they are worried:
By late afternoon there came news that cheered them all.
Government policy towards higher education contains little to cheer university students.
cheer somebody ↔ onphrasal verb
They gathered round the swimming pool and cheered her on.
cheer upphrasal verb
to become less sad, or to make someone feel less sad:
Cheer up! The worst is over.
They cheered up when they saw us coming along.
cheer somebody ↔ up
Here's a bit of news that will cheer you up.
You both need cheering up, I think.
to make a place look more attractive:
I bought some posters to cheer the place up a bit.