fireproof

1 of 2

adjective

fire·​proof ˈfī(-ə)r-ˌprüf 

: proof against or resistant to fire

fireproof

2 of 2

verb

fireproofed; fireproofing; fireproofs

transitive verb

: to make fireproof

Synonyms

Adjective

• incombustible
• noncombustible
• nonflammable
• noninflammable

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

Adjective

How to Safely Store Your Paper Documents Keep your documents in a fireproof container, whether that’s a lockbox or a safe. —Ron Lieber, New York Times, 14 Feb. 2025

Aiming to make a fireproof ship, Gibbs had insisted the S.S. United States be free of wood. —Sonja Anderson, Smithsonian Magazine, 14 Feb. 2025

Verb

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

The what happened: Crews make progress against blazes amid ‘particularly dangerous’ red flag warning The L.A. Times special: Want to fireproof your home? —Anita Chabria, Los Angeles Times, 16 Jan. 2025

Word History

First Known Use

Adjective

1610, in the meaning defined above

Verb

1841, in the meaning defined above

Kids Definition

fireproof

1 of 2 adjective

fire·​proof -ˈprüf 

: not easily burned : made safe against fire

fireproof

2 of 2 verb

: to make fireproof