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

• fireproof
• incombustible
• nonflammable
• noninflammable

Examples of noncombustible in a Sentence

firefighting gear is made of noncombustible material

Recent Examples on the Web

The focus should be on noncombustible or low-ignition species, many of which are also drought-tolerant — such as succulents. —Jamie Gold, Forbes.com, 22 Apr. 2025

The use of concrete as a noncombustible material in AC may lead to fewer claims in the future, as homes built with this technology are better equipped to withstand wildfires. —Michael Molitch-Hou, Forbes.com, 4 Apr. 2025

So houses are mostly Mediterranean, wrapped with stucco or fiber cement — noncombustible materials — with a few splashes of stone and brick thrown in. —Jack Flemming, Los Angeles Times, 19 Feb. 2025

It was intended, in part, to redirect adult smokers to noncombustible products such as e-cigarettes. —Erika Edwards, NBC News, 10 Jan. 2025

Word History

First Known Use

1827, in the meaning defined above

Rhymes for noncombustible

• adjustable
• combustible
• incombustible