adj, noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Any substance that is not combustible. plural

Adjective

1. 1
   That will not readily ignite and burn. not-comparable

Adjective

1. 1
   not capable of igniting and burning wordnet

Synonyms

All synonyms

fire resistantfireproofflame retardantincombustibleincombustiblenonflammable

Antonyms

All antonyms

combustibleflammable

Etymology

From non- + combustible.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.