1. a. (1) — used as an interrogative expressing inquiry about the identity, nature, or value of an object or matter (2) — often used to ask for repetition of an utterance or part of an utterance not properly heard or understood b. who 1, (2) — used as an interrogative expressing inquiry about the character, nature, occupation, position, or role of a person c. — used as an exclamation expressing surprise or excitement and frequently introducing a question d. — used in expressions directing attention to a statement that the speaker is about to make e. (1) — used at the end of a question to express inquiry about additional possibilities (2) — used with or at the end of a question usually in expectation of agreement f. chiefly British — used at the end of an utterance as a form of tag question that IV,1, which 3, who 3,