fuel oil

noun

: an oil that is used for fuel and that usually has a higher flash point than kerosene

Examples of fuel oil 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.
In the rural and poor urban areas, only about 10% have access; the rest get power a few hours a day, if that, from generators running on diesel or heavy fuel oil. Ken Silverstein, Forbes.com, 1 July 2026 Furthermore, the clean juice will save about 15,000 cubic meters of fuel oil that would otherwise be burned to keep the Lufeng pumps spinning. Mrigakshi Dixit, Interesting Engineering, 29 June 2026 And while electrification and sustainable fuels have started to address emissions in cars and planes, shipping has remained stubbornly tied to heavy fuel oil. Mack Degeurin, Popular Science, 25 June 2026 Monday's Cubadebate report also stated that about 1,400 megawatts of generating capacity are offline because of shortages of diesel and fuel oil for smaller power plants. ABC News, 15 June 2026 See All Example Sentences for fuel oil

Word History

First Known Use

1893, in the meaning defined above

Time Traveler
The first known use of fuel oil was in 1893

Cite this Entry

“Fuel oil.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fuel%20oil. Accessed 5 Jul. 2026.

Kids Definition

fuel oil

noun
: an oil that is used for fuel and that usually ignites at a higher temperature than kerosene

More from Merriam-Webster on fuel oil

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster