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
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According to Defence Post, the submarine’s propulsion system combines a hybrid lithium-ion and diesel engine with an electric propeller. Chris Young, Interesting Engineering, 4 May 2026 Industrial facilities, large buildings, institutional facilities, hospitals and electric utilities have diesel engine generators, which serve as backup and emergency power. Nick Lentz, CBS News, 4 May 2026 In terms of propulsion, the yacht is equipped with standard diesel engines plus three Scania gensets for extra electrical power. Rachel Cormack, Robb Report, 16 Apr. 2026 Buyers will be able to select the all-electric version for the cleanest zero-emissions road-tripping, the plug-in hybrid variant for a nice combination of local zero-emissions driving and long-distance gas-electric capability, and the diesel engine for a straightforward, reliable ICE ride. New Atlas, 12 Apr. 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 5 May. 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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