n.
Function: transitive verb
Date: 14th century
1 a : to instill with hope or courage : COMFORT ― usually used with up b : to make glad or happy ― usually used with up
2 : to urge on or encourage especially by shouts < cheer ed the team on>
3 : to applaud with shouts
intransitive verb
1 obsolete : to be mentally or emotionally disposed
2 : to grow or be cheerful : REJOICE ― usually used with up
3 : to utter a shout of applause or triumph
– cheer · er noun