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 acronym stands for diesel exhaust fluid, a solution that breaks down nitrogen oxides and significantly reduces emissions from diesel engines. Caleb Jacobs, The Drive, 18 Mar. 2026 For example, Allen Engineering imports its 75-horsepower diesel engines from Germany. Josh Boak, Los Angeles Times, 18 Mar. 2026 Detroit Diesel is a Daimler Trucks North America subsidiary, manufacturing diesel engines and powertrains in Detroit for Freightliner and Western Star commercial trucks. Paula Wethington, CBS News, 12 Mar. 2026 Like every Greenline, the new 42 can be equipped with either a diesel propulsion system comprising twin 250hp Yanmar engines or a proprietary hybrid setup with 23kW electric motors between the diesel engine and the propeller. Rachel Cormack, Robb Report, 9 Mar. 2026 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 24 Mar. 2026.

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

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