Definition of heatwave noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˈhiːtweɪv//
; NAmE NAmE//ˈhiːtweɪv//
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a period of unusually hot weatherExtra examples It seems likely that the heatwave will go on for some days yet. The demand for water rises sharply during a heatwave. A long summer heatwave had caused most of the crops to die. They said on the news the heatwave is going to continue for weeks.