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

Trees would also be allowed, but would need to be trimmed away from walls and roofs, and residents could install only noncombustible fencing against the house. —Noah Haggerty, Los Angeles Times, 25 Apr. 2026

This means new homes are being constructed with noncombustible or fire-resistant materials. —Mary Wasson, Austin American Statesman, 3 Mar. 2026

Sited on more than 4.5 acres, the home’s exterior features a noncombustible green slate roof, naturally distressed wood siding over fireboard and Durango Noce limestone walls. —Sandra Barrera, Daily News, 14 Feb. 2026

Items mentioned in the ban include noncombustible products which can be chewed, absorbed, dissolved or ingested by other means. —Dana Afana, Freep.com, 22 Oct. 2025

Word History

First Known Use

1827, in the meaning defined above

Rhymes for noncombustible

• adjustable
• combustible
• incombustible