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?

Whether you’re a teacher or a learner, Vocabulary.com can put you or your class on the path to systematic vocabulary improvement.

Dec 24, 2025 · 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 interrogative adverb that can be used alone and shows emotions like surprise or anger. For example: I went to Siberia.

WHY definition: for what? for what reason, cause, or purpose?. See examples of why used in a sentence.