Meaning of the word "as if" in English

What does "as if" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

as if

US /æz ɪf/
UK /æz ɪf/
"as if" picture

Conjunction

as would be the case if

Example:
He acts as if he knows everything.
She looked as if she had seen a ghost.

Interjection

used to express disbelief or scorn

Example:
You think you can finish it by tomorrow? As if!
Me, apologize to him? As if!