noncombustible

adjective

non·​com·​bus·​ti·​ble ˌnän-kəm-ˈbə-stə-bəl 

: incapable of igniting and burning when subjected to fire : not combustible

noncombustible materials

drums of noncombustible waste

Synonyms of noncombustible

• incombustible
• fireproof
• nonflammable

Examples of noncombustible in a Sentence

firefighting gear is made of noncombustible material

Recent Examples on the Web

As for the house, experts advise covering vents where embers could sneak in with mesh, using multi-pane windows that can resist extreme heat, and building walls and roofs out of noncombustible materials. — Los Angeles Times, 15 Oct. 2026

At the same time, the tobacco landscape has evolved, with noncombustible nicotine products such as e-cigarettes and nicotine pouches becoming increasingly prominent. — Emma Fenske, The Conversation, 13 Oct. 2026

For example, potted plants must be in noncombustible pots and easily movable. — Paris Barraza, USA Today, 17 Aug. 2026

The agency also suggested replacing combustible fences attached to the home with a noncombustible option. — Don Sweeney, Sacbee.com, 10 Aug. 2026

Word History

First Known Use

1827, in the meaning defined above

Rhymes for noncombustible

• adjustable
• combustible
• incombustible