noun Date: 1892 an abnormal electrical discharge (as through the air to the ground from a high potential source or between two conducting portions of a structure), the sudden spread of flame over an area when it becomes heated to the flash point
FLASHOVER
Meaning of FLASHOVER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012