fireproof

1 of 2

adjective

fire·​proof ˈfī(-ə)r-ˌprüf How to pronounce fireproof (audio)
: proof against or resistant to fire

fireproof

2 of 2

verb

fireproofed; fireproofing; fireproofs

transitive verb

: to make fireproof

Examples of fireproof in a Sentence

Adjective remember to store valuable papers in a fireproof box Verb The building was not fireproofed.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
The slim, low-profile sneaker originated as a fireproof Formula 1 footwear style, but over the decades has become a go-to sneaker for fashion enthusiasts. Karla Rodriguez, Footwear News, 8 Aug. 2025 Mind you, this was a time when racing had no seat restraints, no fireproof clothing and barely any head protection. Indianapolis Star, IndyStar, 2 July 2025
Verb
Antimony is an indispensable ingredient in ammunition, fireproofing military equipment, nuclear systems, and much more. Lee Habeeb, MSNBC Newsweek, 3 Apr. 2025 Because of their supply of unfree labor to fight fires, Southern leaders felt little need to fireproof their cities, or adopt the innovations in firefighting made possible by new technologies. Justin Hawkins / Made By History, TIME, 31 Jan. 2025 See All Example Sentences for fireproof

Word History

First Known Use

Adjective

1610, in the meaning defined above

Verb

1841, in the meaning defined above

Time Traveler
The first known use of fireproof was in 1610

Browse Nearby Words

Cite this Entry

“Fireproof.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fireproof. Accessed 21 Aug. 2025.

Kids Definition

fireproof

1 of 2 adjective
fire·​proof -ˈprüf How to pronounce fireproof (audio)
: not easily burned : made safe against fire

fireproof

2 of 2 verb
: to make fireproof

More from Merriam-Webster on fireproof

Last Updated: - Updated example sentences
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