• synonyms


[ flash-oh-ver ]
/ ˈflæʃˌoʊ vər /


Electricity. a disruptive discharge around or over the surface of a solid or liquid insulator.
the moment of conflagration or complete incineration caused by superheated air or combustibles.

verb (used without object)

Electricity. to have or experience a flashover.

Nearby words

flashing, flashing point, flashingly, flashlight, flashlight fish, flashover, flashpacker, flashpoint, flashtube, flashy, flask

Origin of flashover

First recorded in 1890–95; orig. noun use of verb phrase flash over Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for flashover


/ (ˈflæʃˌəʊvə) /


an electric discharge over or around the surface of an insulator
the sudden and rapid spread of fire through the air, caused by the ignition of smoke or fumes from surrounding objects
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012