The meaning of WHY is for what cause, reason, or purpose. How to use why in a sentence.

When we ask for reasons in speaking, we can use the phrase why is that? In informal conversations we often say why’s that?: …

You use why in questions when you ask about the reasons for something. Why hasn't he brought the bill? Why didn't he stop me? Why can't I remember the exact year we married?

a. for what reason, purpose, or cause?: why are you here?. b. (used in indirect questions): tell me why you're here.

Across the room from her, a man forgot what he was arguing about, why he was even arguing.

Jan 20, 2026 · Adverb why (not comparable) (interrogative) For what cause, reason, or purpose. Introducing a complete question.

Why definition: For what purpose, reason, or cause; with what intention, justification, or motive.

an introductory expression of surprise, disagreement, indignation, etc: why, don't be silly! Etymology: Old English hwī; related to Old Norse hvī, Gothic hveileiks what kind of, Latin quī

"Why" is an adverb used to ask for the reason, cause, or purpose of something. It is typically used to inquire about the motive or explanation behind an action, event, or decision.

why: For what purpose, reason, or cause; with what intention, justification, or motive.