diesel engine

noun

: an internal combustion engine in which air is compressed to a temperature sufficiently high to ignite fuel injected into the cylinder where the combustion and expansion actuate a piston

Examples of diesel engine in a Sentence

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 resolutions target the California Air Resources Board’s (CARB) Advanced Clean Cars II program, Advanced Clean Trucks rules, and heavy-duty diesel engine standards. David Blackmon, Forbes.com, 11 June 2025 This rig has an automatic transmission, which makes things a bit easier, and is powered by Toyota’s legendary 3-liter diesel engine. Bryan Rogala, Outside Online, 23 Apr. 2025 The first two versions of the Starship were powered by diesel engines, achieving notable fuel efficiencies compared to industry standards. Kurt Knutsson, Cyberguy Report, Fox News, 13 Jan. 2025 Gas and diesel engines both work through a process called internal combustion. Michael Leamy, Discover Magazine, 2 Nov. 2024 See All Example Sentences for diesel engine

Word History

First Known Use

1894, in the meaning defined above

Time Traveler
The first known use of diesel engine was in 1894

Cite this Entry

“Diesel engine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diesel%20engine. Accessed 15 Jun. 2025.

Kids Definition

diesel engine

noun
: an internal-combustion engine in which air is compressed to make enough heat to ignite the fuel in the cylinder

More from Merriam-Webster on diesel engine

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