combustible

adjective

com·​bus·​ti·​ble kəm-ˈbə-stə-bəl How to pronounce combustible (audio)
Synonyms of combustiblenext
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.
Moreno-Gama was being held Monday in the San Francisco County Jail on various state charges, including possession or manufacture of combustible material or an incendiary device and arson. Juan Lozano, Fortune, 13 Apr. 2026 With these two planets meeting in Aries — the first sign of the zodiac — the synergy is a combustible mix of courage and spirit. Valerie Mesa, PEOPLE, 10 Apr. 2026 Additionally, Boyle points out that fiber cement siding is non-combustible and hail damage resistant, which might reduce your insurance premiums. Jenny Hughes, The Spruce, 5 Apr. 2026 Rooted in a combustible mix of left-wing populism and petro-state largesse, the movement secured loyalty through social programs funded by an oil boom that has long since turned to bust. Boris Muñoz, Time, 3 Apr. 2026 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 14 Apr. 2026.

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

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster