Definition of “what, how, why, etc. in the world” - English Dictionary

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“what, how, why, etc. in the world” in British English

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what, how, why, etc. in the world

informal

used to emphasize your surprise when asking a question:

What in the world are you doing in the cupboard?
Who in the world could do such a thing?

(Definition of “what, how, why, etc. in the world” from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)