Apr 4, 2026 · The meaning of WHY is for what cause, reason, or purpose. How to use why in a sentence. used to express surprise or anger: 3. the reasons for something: . for what reason, purpose, or cause? (used in indirect questions) 2. for or because of which 3. Click for more definitions. why synonyms, why pronunciation, why translation, English dictionary definition of why. For what purpose, reason, or cause; with what intention, justification, or motive: Why is the door shut? … Why as an interrogative adverb asks questions about the reason for something, gives suggestions, or expresses annoyance. Take a look at the uses of why and some examples: Pass in Wallet. WHY lives on your machine turning your desktop into a private intelligence layer that works while you live.