fireproof

1 of 2

adjective

fire·​proof ˈfī(-ə)r-ˌprüf How to pronounce fireproof (audio)
Synonyms of fireproofnext
: 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
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Adjective
Outside are nearly $1 million of other cameras and instruments in a fireproof building nearby and scattered around. ABC News, 21 Apr. 2026 The entire city block-sized Norton Tire warehouse was leveled, save a massive, fireproof computer vault that kept the company’s business records intact. Howard Cohen, Miami Herald, 15 Apr. 2026
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 24 Apr. 2026.

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

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