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 of fireproof

Adjective

• noncombustible
• incombustible
• nonflammable

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

Those things are fireproof, at least. — Ashley Hume, FOXNews.com, 9 May 2026

Gravel is permanent, fireproof, and ideal for xeriscaping or rock gardens, but can trap soil and weeds, and may overheat plants. — Andy Wilcox, Better Homes & Gardens, 9 June 2026

Verb

In the latest development, the state is trying to thread the needle by requiring insurers to offer a discount when residents fireproof their homes. — Kyle Bagenstose, USA TODAY, 11 July 2022

Related article As California wildfires become more frequent, people will need to fireproof their homes. — Dakin Andone, CNN, 15 Jan. 2025

Word History

First Known Use

Adjective

1610, in the meaning defined above

Verb

1841, in the meaning defined above

Rhymes for fireproof

• bulletproof
• waterproof
• weatherproof
• aloof
• behoof
• disproof
• flameproof
• foolproof
• greaseproof
• leakproof
• reproof
• soundproof

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