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?: …

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

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?

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

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

why, adv., int., & n. meanings, etymology, pronunciation and more in the Oxford English Dictionary

"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 is an interrogative adverb that can be used alone and shows emotions like surprise or anger. For example: I went to Siberia.