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Definition of flash flood noun from the Oxford Advanced Learner's Dictionary

flash flood

noun
 
/ˌflæʃ ˈflʌd/
 
/ˌflæʃ ˈflʌd/
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  1. a sudden flood of water caused by heavy rain
    • More than 80 people were feared dead last night after flash floods, the worst in 34 years.
    Topics Weatherc2, The environmentc2
See flash flood in the Oxford Advanced American Dictionary
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