Definitions

1. noun

an onomatopoeic word that imitates the sound of something, typically a person’s cry or an animal’s noise

“She let out a loud broo as she saw her favorite dog on the screen.”

2. interjection

an expression of emotion, especially surprise or excitement

“The crowd erupted into a collective broo as the concert started.”

3. verb

to make a loud, high-pitched cry, especially of excitement or surprise

“She began to broo loudly when she won the contest.”