noun. An unintended electric arc, as between two pieces of apparatus.

noun. The temperature point at which the heat in an area is high enough to ignite all flammable material simultaneously.

noun. The near simultaneous ignition of all combustible material in an enclosed area.

noun. An unintended electric discharge or arc over or around an insulator

noun. an unintended electric discharge (as over or around an insulator)

"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."

flashover voltage  

arc  discharge  electric arc  electric discharge  spark  

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