flashover

noun
flash·​over | \ˈflash-ˌō-vər \

Definition of flashover 

1 : an abnormal electrical discharge (as through the air to the ground from a high potential source or between two conducting portions of a structure)

2 : the sudden spread of flame over an area when it becomes heated to the flash point

Examples of flashover in a Sentence

Recent Examples on the Web

Among them: Toledo, Ohio, firefighters Jamie Dickman, 31, and Stephen Machcinski, 42, killed in a flashover on Jan. 26, 2014. Mike Hendricks, kansascity, "In a tragic loop, firefighters continue to die from preventable mistakes," 13 July 2018 Even more dangerous than a rollover is a flashover. Sean Flynn, Esquire, "The Perfect Fire," 9 Mar. 2017 Unlike a rollover, however, a flashover happens everywhere at once; every molecule of atmosphere, every object in the vicinity, instantly turns to fire. Sean Flynn, Esquire, "The Perfect Fire," 9 Mar. 2017 To show the effects of a flashover, rollover and the better understanding of a blaze, the Olmsted Township Fire Department hosted a regional fire training simulator last week that also included Olmsted Falls and North Olmsted firefighters. Joanne Berger Dumound/special To Cleveland.com., cleveland.com, "Simulator gives firefighters an early view of an inferno: Olmsted Dates and Data," 5 June 2017 Olmsted Township helped its firefighters and those of two other departments learn more about fires, including rollovers and flashovers, that occur in a blaze. Joanne Berger Dumound/special To Cleveland.com., cleveland.com, "Simulator gives firefighters an early view of an inferno: Olmsted Dates and Data," 5 June 2017 The vast majority travels around the outside in a 'flashover' effect, Cooper explains. Charlotte Huff, CNN, "This is what it's like to be struck by lightning," 25 May 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'flashover.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of flashover

1892, in the meaning defined at sense 1

Keep scrolling for more

Learn More about flashover

Statistics for flashover

Look-up Popularity

Time Traveler for flashover

The first known use of flashover was in 1892

See more words from the same year

More from Merriam-Webster on flashover

See words that rhyme with flashover

Comments on flashover

What made you want to look up flashover? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

noxious or harmful

Get Word of the Day daily email!

Test Your Vocabulary

A Thanksgiving Word Quiz

  • a-traditional-thanksgiving-dinner
  • November comes from a word for which of the following numbers?
True or False

Test your knowledge - and maybe learn something along the way.

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!