Meaning of “give sb a heads up” in the English Dictionary

English

"give sb a heads up" in English

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give sb a heads up

informal

to tell someone that something is going to happen:

I just wanted to give you all a heads up that we will be talking about the first two chapters of the book tomorrow.

(Definition of “give sb a heads up” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)