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what

determiner, pronoun, exclamation (QUESTION)
 
 
/wɒt/ US  /wɑːt/

Definition

A1 used to ask for information about people or things: What time is it? What books did you buy? What did you wear? What size shoes do you take? What happened after I left? What caused the accident?Question words and expressions used in questions that show you are surprised or do not believe something: "I've just told Peter." "What?/You did what?" What's this I hear? You're leaving?Question words and expressions what... for? B2 used to ask about the reason for something: What are these tools for? What are you doing that for? "We need a bigger car." "What for?"Question words and expressions
(Definition of what determinerpronounexclamation (QUESTION) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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