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The cuts impact funding for replacing outdated diesel engines and at-sea refrigeration systems—projects that environmentalists argue would reduce the seafood industry's carbon footprint. Hannah Parry, Newsweek, 20 Mar. 2025 Instead of investing in modern, lower-emission alternatives, all vehicles were ordered with diesel engines based on the Euro III emissions standard—a regulation that is 25 years old and has been replaced multiple times. Ingmar Rentzhog, Forbes, 11 Mar. 2025 The credits effectively made the cost of buying some electric cars roughly on par with prices for cars with gasoline or diesel engines. Jack Ewing, New York Times, 21 Jan. 2025 For now, there's no EV option but buyers can choose from a variety of petrol and diesel engines. Matthew MacConnell, Forbes, 6 Jan. 2025 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 29 Mar. 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

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!