Combustible means "able to catch fire," like matches or the extremely dry forest floors that people sometimes forget are combustible — until they go up in flames.

When the adjective combustible first entered the English language in the sixteenth century, it was used to describe things that burn easily. The word soon came to apply not only to objects that ignite but also to tempers that are prone to "catch fire" easily. If you’ve ever been around a person who has a combustible temper, you can understand the connection.

Definitions of combustible

adj capable of igniting and burning

burnable, ignitable, ignitible
capable of burning
comburant, comburent, combustive
supporting combustion
flammable, inflammable
easily ignited
can emit sparks or burst into flame
capable of catching fire spontaneously or causing fires or burning readily
incombustible, noncombustible
not capable of igniting and burning
impervious to damage by fire
fire-resistant, fire-resisting, fire-resistive, fire-retardant
difficult to burn
flame-retardant, flameproof
resistant to catching fire
impossible to ignite
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n a substance that can be burned to provide heat or power

combustible material
Type of:
a substance that can be consumed to produce energy

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