The meaning of WHAT is —used as an interrogative expressing inquiry about the identity, nature, or value of an object or matter. How to use what in a sentence. Definition of what pronoun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. May 4, 2026 · A diploma in the waiting room revealed Big Boy to be a member of The American Association of Medical Hydrology, whatever that might be. Furthermore he was a deacon of the … WHAT meaning: 1. used to ask for information about people or things: 2. used in questions that show you are…. What … what (hwut, hwot, wut, wot; unstressed hwət, wət), pron. (used interrogatively as a request for specific information): What is the matter? (used interrogatively to inquire about the character, occupation, … Definition of what in the Definitions.net dictionary. What does what mean? Information and translations of what in the most comprehensive dictionary definitions resource on the web.