An example of wow is how a woman would respond to her best friend when she hears that her friend is getting married.
A performance that wowed the audience.
Wow... I can't believe you would do such a thing."
He really wowed the audience.
He did? That's a wow!
Origin of wow
From American Heritage Dictionary of the English Language, 5th Edition
- Attested since the 16th century, of Scottish origin.