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Synonyms

combustible

American  
[kuhm-buhs-tuh-buhl] / kəmˈbʌs tə bəl /

adjective

  1. capable of catching fire and burning; inflammable; flammable.

    Gasoline vapor is highly combustible.

  2. easily excited.

    a high-strung, combustible nature.


noun

  1. a combustible substance.

    Trucks carrying combustibles will not be allowed to use this tunnel.

combustible British  
/ kəmˈbʌstəbəl /

adjective

  1. capable of igniting and burning

  2. easily annoyed; excitable

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. a combustible substance

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • combustibility noun
  • combustibleness noun
  • combustibly adverb
  • uncombustible adjective

Etymology

Origin of combustible

From the Late Latin word combūstibilis, dating back to 1520–30. See combust, -ible

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

They were behind the decision to bring in Tudor, the combustible Croatian with a chequered coaching career and no Premier League experience, to succeed the sacked Thomas Frank.

From BBC • Mar. 29, 2026

If those Lakers — combustible and bored but built better than every other team on the planet at the time — could turn the triple play, so can Roberts’ drama-free superteam.

From Los Angeles Times • Mar. 23, 2026

Social media industry analyst Matt Navarra said TikTok's decision to "swim against the tide" is a savvy one - but comes with "pretty combustible optics".

From BBC • Mar. 3, 2026

The author also keeps an eye on the larger socio-political context, particularly in Philadelphia during the Mayor Frank Rizzo era, when racial tension was combustible.

From The Wall Street Journal • Feb. 12, 2026

But all of a sudden, more than you know, he’s outside somewhere, sometimes even alone, crossing the streets, scaling rocks, wrestling with dogs, swimming in pits, getting into everything mechanical and combustible and toxic.

From "Native Speaker" by Chang-rae Lee