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combustible

/kəmˈbʌstəbəl/
/kəmˈbʌstəbəl/
IPA guide

Other forms: combustibles; combustibly

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
  1. adjective
    capable of igniting and burning
    synonyms:
    burnable, ignitable, ignitible
    capable of burning
    comburant, comburent, combustive
    supporting combustion
    flammable, inflammable
    easily ignited
    ignescent
    can emit sparks or burst into flame
    incendiary
    capable of catching fire spontaneously or causing fires or burning readily
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    antonyms:
    noncombustible
    not capable of igniting and burning
    fireproof
    impervious to damage by fire
    flame-retardant, flameproof
    resistant to catching fire
    nonflammable
    impossible to ignite
  2. noun
    a substance that can be burned to provide heat or power
    see moresee less
    type of:
    fuel
    a substance that can be consumed to produce energy
Pronunciation
US
/kəmˈbʌstəbəl/
UK
/kəmˈbʌstəbəl/
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DISCLAIMER: These example sentences appear in various news sources and books to reflect the usage of the word ‘combustible'. Views expressed in the examples do not represent the opinion of Vocabulary.com or its editors. Send us feedback
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