/flash"oh'veuhr/ , n.
1. Elect. a disruptive discharge around or over the surface of a solid or liquid insulator.
2. the moment of conflagration or complete incineration caused by superheated air or combustibles.
v.i.
3. Elect. to have or experience a flashover.
[ 1890-95; orig. n. use of v. phrase flash over ]