combustible

adjective

com·​bus·​ti·​ble kəm-ˈbə-stə-bəl How to pronounce combustible (audio)
1
: capable of combustion
combustible materials, such as paper, leaves, and sawdust
combustible gases
2
: easily excited
a combustible temper
The coach had to keep the combustible players under control.
combustibility noun
combustible noun
combustibly adverb

Examples of combustible in a Sentence

The fuel is highly combustible. don't store oily rags and other combustible materials in a hot attic
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The accelerated momentum was helpful in stabilizing — or perhaps acclimating viewers to — the show’s mishmash of tones, which staple together motormouthed policy wonkery and combustible romantic chemistry. Alison Herman, Variety, 16 Oct. 2025 In a criminal complaint, authorities allege Rinderknecht caused the fire by lighting a combustible material, such as vegetation or paper, with an open flame, likely a lighter. Alex Stone, ABC News, 15 Oct. 2025 As in prior moral panics, the technology proved to be an easy and tangible scapegoat, which enabled Americans to avoid grappling with the complex social factors—like deindustrialization, urban decay, and disillusioned suburban children—that led to a combustible situation ripe for tragedy. Time, 8 Oct. 2025 Rinderknecht — who once lived in the Pacific Palisades area — likely used a lighter that set fire to combustible material such as vegetation or paper, authorities alleged in the complaint. Nicole Acosta, PEOPLE, 8 Oct. 2025 See All Example Sentences for combustible

Word History

Etymology

borrowed from Medieval Latin combustibilis, from Latin combustus (past participle of combūrere "to destroy with fire, combust") + -ibilis -ible

First Known Use

1529, in the meaning defined at sense 1

Time Traveler
The first known use of combustible was in 1529

Browse Nearby Words

Cite this Entry

“Combustible.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/combustible. Accessed 22 Oct. 2025.

Kids Definition

combustible

adjective
com·​bus·​ti·​ble kəm-ˈbəs-tə-bəl How to pronounce combustible (audio)
1
: capable of being burned
2
: catching fire or burning easily
combustibility noun
combustible noun

Medical Definition

combustible

adjective
com·​bus·​ti·​ble kəm-ˈbəs-tə-bəl How to pronounce combustible (audio)
: capable of combustion
combustible anesthetics

More from Merriam-Webster on combustible

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