n. The near simultaneous ignition of all combustible material in an enclosed area.
n. An unintended electric discharge or arc over or around an insulator
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an unintended electric discharge (as over or around an insulator)
Word Usage
"TODD: Federal officials tell us it only takes about a minute - and-a-half for what they call a flashover -- for the cabin to be engulfed in smoke, as shown in this simulation."