fire·proof | \ ˈfī(-ə)r-ˌprüf \

Definition of fireproof 

(Entry 1 of 2)

: proof against or resistant to fire


fireproofed; fireproofing; fireproofs

Definition of fireproof (Entry 2 of 2)

transitive verb

: to make fireproof

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Synonyms & Antonyms for fireproof

Synonyms: Adjective

incombustible, noncombustible, nonflammable, noninflammable

Antonyms: Adjective

burnable, combustible, flammable, ignitable (also ignitible), inflammable

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Examples of fireproof in a Sentence


remember to store valuable papers in a fireproof box


The building was not fireproofed.

Recent Examples on the Web: Adjective

Aspen officials planned a fireproof display using drone lights in place of fireworks., "Wildfires keep growing in US West," 4 July 2018 Only use fireworks outdoors away from buildings on a flat, level, hard, fireproof surface that is free from debris. Sarah Brookbank,, "Fourth of July: Best tips to stay safe when using fireworks," 4 July 2018 Two smaller pistols — a Star 9 millimeter and Bersa Thunder 380 — were found in a fireproof safe, Michalak said. Becky Jacobs, Post-Tribune, "In footage shown at trial, police find woman's body on floor of Lake Station home days after she likely died," 25 Apr. 2018 James Long, a spokesman for the Fire Department, said Sunday that residents in a fireproof building, like Trump Tower, were safest inside their apartments rather than evacuating. John Leland And Luis Ferre-sadurni,, "Art collector, bon vivant dies in Trump Tower home he couldn’t sell," 9 Apr. 2018 The Good Housekeeping Stran-Steel House at the 1933 Chicago World's Fair was a showcase for affordable, fireproof, prefabricated housing that blended modern technology and furnishings. Good Housekeeping, "The History of the Good Housekeeping Institute," 31 Oct. 2015 Just about everything worn by NASCAR drivers and their pit crews is fireproof - and for good reason. Michelle R. Martinelli, USA TODAY, "NASCAR crew member catches on fire, reacts casually," 14 Apr. 2018 Nigro said that fighting a fire in a cellar is one of the most dangerous tasks that firefighters take on, and that in a building that isn’t fireproof, like the one on St. Nicholas Avenue, flames are liable to spread rapidly. Michael Schwirtz And Austin Ramzy,, "NYC firefighter dies battling blaze on Harlem movie set," 23 Mar. 2018 So Metro went with a durable — and more fireproof — carpet befitting airlines and commuter rail services. Faiz Siddiqui, Washington Post, "The story behind the carpeting in Metro’s rail cars? It stinks.," 8 Feb. 2018

Recent Examples on the Web: Verb

Additional legislation in Sacramento seeks to fireproof the state’s energy infrastructure. Kurtis Alexander,, "With wildfire season at hand, California on slightly safer footing this year," 17 June 2018 In the main living space, vaulted brick panels appear to float from the ceiling while steel beams that have been fireproofed add texture to the space. Lauren Ro, Curbed, "Moody apartment renovation is all about natural materials," 23 Apr. 2018 The couple returned home Monday evening, and tried to fireproof the property. Ian Lovett, WSJ, "Shifting Conditions, Poor Communications Complicate California Wildfires," 12 Oct. 2017 Scientists contend that if money were redirected from firefighting into projects like fireproofing homes, those communities could actually be made safer. Justin Gillis, The Seattle Times, "Let forest fires burn? A black-backed woodpecker would applaud," 11 Aug. 2017 This wouldn’t necessarily be bad advice if the building were fully fireproofed and adapted to ensure that fire doesn’t spread from floor to floor. Feargus O'sullivan, The Atlantic, "The Grenfell Tower Fire and London's Public-Housing Crisis," 14 June 2017 The government suggested fireproofing several buildings at the center where the festival is held. Jaime Yaya Barry, New York Times, "Fire Tears Through Senegal Religious Festival, Killing at Least 22," 13 Apr. 2017

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

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First Known Use of fireproof


1610, in the meaning defined above


1841, in the meaning defined above

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Statistics for fireproof

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Time Traveler for fireproof

The first known use of fireproof was in 1610

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More Definitions for fireproof



English Language Learners Definition of fireproof

 (Entry 1 of 2)

: not easily burned : not able to catch fire



English Language Learners Definition of fireproof (Entry 2 of 2)

: to make (something) safe from fire


fire·proof | \ ˈfīr-ˈprüf \

Kids Definition of fireproof

: not easily burned : made safe against fire

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Comments on fireproof

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


alleviating pain or harshness

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