cheer

1 cheer /ˈtʃiɚ/ noun
plural cheers
1 cheer
/ˈtʃiɚ/
noun
plural cheers
Britannica Dictionary definition of CHEER
1 
[count] : a shout of praise or encouragement
2 
[noncount] somewhat formal : a happy feeling or attitude
3 
[count] : a special song or chant that is performed to encourage a team during a game in sports like American football and basketball
— see also bronx cheer
2 cheer /ˈtʃiɚ/ verb
cheers; cheered; cheering
2 cheer
/ˈtʃiɚ/
verb
cheers; cheered; cheering
Britannica Dictionary definition of CHEER
1 
a  : to shout with joy, approval, or enthusiasm
[no object]
[+ object]
b  [+ object] : to express enthusiastic approval of or support for (something)
2 
[+ object] : to cause (someone) to feel happier or more hopeful

cheer on

[phrasal verb]
cheer (someone) on or cheer on (someone)
: to encourage (someone) with shouts or cheers

cheer up

[phrasal verb]
1 
cheer up or cheer (someone) up or cheer up (someone) : to become happier or to make (someone) happier
2 
cheer (something) up or cheer up (something) : to make (something) more cheerful or pleasant