Definitions

1. interjection

an expression of excitement or triumph

“The team let out a loud ‘hurroo’ as they won the championship.”

2. noun

a loud, exultant cry, especially as a cheer or a shout of triumph

“The crowd’s ‘hurroo’ echoed through the stadium.”

3. verb

to cheer or shout ‘hurroo’, especially in triumph or celebration

“The crowd began to hurroo as the team scored the winning goal.”