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

Much of the Red Barn’s irreplaceable art and ephemera, meticulously and lovingly curated over the years, was lost — but the music series, powered by the fireproof resiliency of those who oversee the collective, barely skipped a beat. — Aaron Davis, Sacbee.com, 2 Oct. 2026

Consider keeping an original will at the estate planner’s office or in a waterproof and fireproof container in your home or other accessible location. — Bob Carlson, Forbes.com, 28 Aug. 2026

Verb

Midrange gun cabinets are typically between $200-$500 and can have a keypad or biometric security and store more firearms, but fancier protections like fireproofing and waterproofing add to the cost. — Bestreviews, Mercury News, 7 July 2026

Timberline Glamping identified an issue with a batch of canvas tents that prevent fireproofing and waterproofing treatments from working together, and glampsites using those tents will remain closed. — Christopher Derose, CBS News, 10 June 2026

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