flash flood
noun
a sudden and destructive rush of water down a narrow gully or over a sloping surface, caused by heavy rainfall.
Origin of flash flood
First recorded in 1935–40
Words nearby flash flood
flash burn,
flash card,
flash drive,
flash eliminator,
flash fiction,
flash flood,
flash gun,
flash in the pan,
flash lamp,
flash memory,
flash method
British Dictionary definitions for flash flood
flash flood
noun
a sudden short-lived torrent, usually caused by a heavy storm, esp in desert regions
Scientific definitions for flash flood
flash flood
[ flăsh ]
A sudden, localized flood of great volume and short duration, typically caused by unusually heavy rain in a semiarid area. Flash floods can reach their peak volume in a matter of a few minutes and often carry large loads of mud and rock fragments.