Updated February 21, 2017 | Factmonster Staff

An interjection expresses an emotion. It might show excitement or surprise.

Wow! That is a giant pumpkin!
Ouch, you stepped on my toe!
Yippee! We won!
Whoa! Hold your horses!
Bravo, you did a great job!

An interjection often appears at the beginning of a sentence. It is usually followed by an exclamation point or a comma.

See also: Interjections: Zap! Pow! Wow!.