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English definition of “heads-up”

heads-up

noun [C usually singular]     /ˈhedz.ʌp/ informal
a warning that something is going to happen, usually so that you can prepare for it: This note is just to give you a heads-up that Vicky will be arriving next week.Threats and warnings UK a short talk or statement about how a situation or plan is developing: The boss called a meeting to give us a heads-up on the way the project was going.
(Definition of heads-up noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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