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 simple but powerful model for how leaders inspire action, starting with a golden circle and the question Why? ….more Delve into the comprehensive guide for why in The Academic Glossary. This entry covers its deep etymology, various definitions, real-world usage examples in literature, media, and daily discourse, and common idiomatic phrases, aiding a complete understanding. Why is an interrogative adverb that can be used alone and shows emotions like surprise or anger. For example: I went to Siberia. 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? Search the world's information, including webpages, images, videos and more. Google has many special features to help you find exactly what you're looking for.