Definitions

1. interjection

an expression of excitement, joy, or other strong emotions

“She let out a loud ‘wahwah’ as she saw her friend walk through the door.”

2. noun

a musical or sound effect often used to imitate the sound of a car horn or a musical instrument

“The film used a lot of wahwah sounds to create its unique atmosphere.”

3. verb

to make a loud, wailing sound, often used to express excitement or joy

“The kids were wahooing with excitement as they rode the rollercoaster.”