Definition of incombustible in English:

incombustible

adjective

  • (especially of a building material or component) consisting or made of material that does not burn if exposed to fire.

    • ‘Undeterred, he took out a patent in 1797 for incombustible material: floorboards constructed from long, thick strips of fired clay.’
    • ‘Following a big fire, there are always discussions about potential techno fixes, like more supertanker planes, better foams and incombustible construction.’
    non-flammable, non-combustible, not inflammable, unburnable
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Origin

Late 15th century: from medieval Latin incombustibilis, from in- ‘not’ + combustibilis (see combustible).

Pronunciation

incombustible

/ˌinkəmˈbəstəb(ə)l//ˌɪnkəmˈbəstəb(ə)l/