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

Fire-proofing strategies include using noncombustible materials in decks and fences, moving plants away from houses and limiting the use of certain beloved plants — like rosemary or junipers — because they are known to be flammable. — Martha Ross, Mercury News, 3 July 2026

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

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