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  • diesel
    diesel
    adjective
    noting a machine or vehicle powered by a diesel engine.
  • Diesel
    Diesel
    noun
    Rudolf 1858–1913, German automotive engineer.
Synonyms

diesel

1 American  
[dee-zuhl, -suhl] / ˈdi zəl, -səl /
Or Diesel

adjective

  1. noting a machine or vehicle powered by a diesel engine.

    diesel locomotive.

  2. of or relating to a diesel engine.

    diesel fuel.


noun

  • diesels
    plural
  1. diesel engine.

  2. a vehicle powered by a diesel engine.

  3. diesel fuel.

Diesel 2 American  
[dee-zuhl, -suhl] / ˈdi zəl, -səl /

noun

  1. Rudolf 1858–1913, German automotive engineer.


diesel 1 British  
/ ˈdiːzəl /

noun

  1. See diesel engine

  2. a ship, locomotive, lorry, etc, driven by a diesel engine

  3. informal short for diesel oil

  4. slang any cola drink

    spook and diesel

  5. See suck

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Diesel 2 British  
/ ˈdiːzəl /

noun

  1. Rudolf (ˈruːdɔlf). 1858–1913, German engineer, who invented the diesel engine (1892)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Noun Inflected Forms

Etymology

Origin of diesel

After R. Diesel, the engine's inventor

Explanation

A diesel is a type of engine that produces enough heat to burn fuel and power a vehicle. Most diesels run on very thick, heavy oil. Large trucks use diesels — also known as diesel engines — and so do some cars, trains, and ships. The earliest diesel was developed in the late 19th century, and its invention is credited to the German engineer Rudolph Diesel, although other inventors laid the groundwork with their development of a very similar type of engine.

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Vocabulary lists containing diesel

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Prices for energy and petroleum increased 6.4% for the month, led by rises in diesel fuel and gasoline.

From The Wall Street Journal Aug. 20, 2026

With the conflict in Iran now in its sixth month, U.S. refineries have become the world’s gasoline and diesel suppliers of last resort.

From MarketWatch Aug. 20, 2026

Attacks on refineries in Saudi Arabia and in Russia, which recently extended its ban on diesel exports to protect its own supply, have compounded the problem.

From MarketWatch Aug. 20, 2026

The resulting scarcity has pushed up prices of diesel fuel, fertilisers and pesticides.

From Barron's Aug. 18, 2026

The locomotive was a diesel electric and there were eight stainless steel passenger coaches behind it.

From "The Road" by Cormac McCarthy

Diesel is the fuel of choice for heavy-duty vehicles and machinery, and its price affects every corner of the economy.

From MarketWatch Aug. 20, 2026

Diesel prices have been rising even faster than those for gasoline or crude oil.

From The Wall Street Journal Jul. 24, 2026

"Diesel fuel is required to generate it," she added.

From BBC Jul. 23, 2026

Richard Turner, who owns Diesel in Brentwood, was among a small group of store owners who decided to organize the event.

From Los Angeles Times Jul. 21, 2026

“You are entertaining. So Bulgu will give you two choices,” the monster says in that voice that would make Vin Diesel jealous.

From "Kwame Crashes the Underworld" by Craig Kofi Farmer

Replacing the 200,000 buses with another round of health-hazardous diesels would cost between $60 billion to $80 billion; after accounting for rollout costs, full electric replacement would cost about 2.5 times as much.

From Salon May 23, 2024

Pichetto Fratin said the government had ordered a review and update of regional anti-pollution plans, and that while this was pending, planned restrictions on Euro 5 diesels were temporarily suspended.

From Reuters Sep. 7, 2023

But in general petrol cars made before 2005 and diesels built before September 2014 are not allowed in the zone.

From BBC Aug. 21, 2023

Governments frown on diesels in European cities, and come 2025, diesel cars will be banned from Paris and Madrid.

From Seattle Times May 28, 2023

“She’s forty-six feet. Twin diesels, eight hundred horses.”

From "Flush" by Carl Hiaasen

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