Meaning of the word "what if" in English

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

what if

US /wʌt ɪf/
UK /wɒt ɪf/

Phrase

used to ask about the consequences of a hypothetical situation

Example:
What if we miss the train?
What if it rains tomorrow?