✨📕 The NEWThe NEW Collegiate Dictionary, 12th Edition Over 5,000 words added — Buy Now! Collegiate DictionaryBuy Now!

combust

verb

com·​bust kəm-ˈbəst How to pronounce combust (audio)
combusted; combusting; combusts
Synonyms of combustnext
: burn

Examples of combust in a Sentence

anthracite, which is naturally hard, combusts more cleanly than bituminous coal
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.
Helsley combusted during his time with the Mets this past summer, but a good chunk of that failure could be chalked up to pitch tipping. Zach Pressnell, MSNBC Newsweek, 26 Nov. 2025 The city celebrating itself, egos combusting in the concrete jungle. Literary Hub, 7 Nov. 2025 The rounded piston heads, slotted into a rounded chamber to match, offered higher efficiency with less energy lost to heat while fuel is combusted before being sent out as exhaust. Liam Rappleye, USA Today, 6 Oct. 2025 The rounded piston heads, slotted into a rounded chamber to match, offered higher efficiency with less energy lost to heat while fuel is combusted before being sent out as exhaust. Liam Rappleye, Freep.com, 3 Oct. 2025 See All Example Sentences for combust

Word History

Etymology

derivative of earlier combust, combusted "burned, consumed," going back to Middle English combust, borrowed from Latin combustus, past participle of combūrere "to destroy with fire, reduce to ashes, calcine," from com- com- + ūrere "to expose to fire, burn, scorch" (with -b- from ambūrere "to burn around, scorch," falsely parsed as am- + būrere) — more at adust

First Known Use

15th century, in the meaning defined above

Time Traveler
The first known use of combust was in the 15th century

Browse Nearby Words

Cite this Entry

“Combust.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/combust. Accessed 7 Dec. 2025.

Kids Definition

combust

verb
com·​bust kəm-ˈbəst How to pronounce combust (audio)
: to be or set on fire : burn
Last Updated: - Updated example sentences
Love words? Need even more definitions?

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