Interjection

An interjection is a word or group of words interjected, or thrown, into the sentence. It is usually followed by an exclamation point. In other words, an interjection is an exclamation used to express feelings.

An interjection is a word or group of words used to express surprise or other emotion without being grammatically related to other words in the sentence.

Examples:

Oh! Great!

Ah! Hurrah!

Ha! Ouch!

Congratulations!

For heaven's sake!

God forbid!

May God prevail!

Aha!

Bravo!

What!

Oh, never have seen such cowardice before!

Alas, that I should be the victim of despair!