Meaning of “heatwave” in the English Dictionary

british dictionary

"heatwave" in British English

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heatwavenoun [ C usually singular ]

uk /ˈhiːtˌweɪv/ us /ˈhiːtˌweɪv/

a period of time such as a few weeks when the weather is much hotter than usual

(Definition of “heatwave” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)