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Definition of Incombustible
1. Adjective. Not capable of igniting and burning.
Exact synonyms: Noncombustible
Similar to: Fireproof, Fire-resistant, Fire-resisting, Fire-resistive, Fire-retardant, Flame-retardant, Flameproof, Nonflammable
Antonyms: Combustible
Similar to: Fireproof, Fire-resistant, Fire-resisting, Fire-resistive, Fire-retardant, Flame-retardant, Flameproof, Nonflammable
Antonyms: Combustible
Definition of Incombustible
1. a. Not combustible; not capable of being burned, decomposed, or consumed by fire; uninflammable; as, asbestus is an incombustible substance; carbon dioxide is an incombustible gas.
Definition of Incombustible
1. [n -S]