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.
Heavy fuel oil also produces black carbon, a kind of soot that can settle on the ice and accelerate melt by darkening the surface, meaning more of the sun’s energy is absorbed. Laura Paddison, CNN Money, 3 Oct. 2025 The average savings for an American home that makes the switch are nothing to scoff at, with even bigger savings when making the swap from fuel oil, propane, or traditional electric heating. Sara Kiley Watson, Popular Science, 2 Oct. 2025 This reduces reliance on conventional fuel oil, leading to lower operating costs and emissions. Georgina Jedikovska, Interesting Engineering, 1 Oct. 2025 Sabel and Pender saw an opportunity for Haiti to reduce its dependence on pricy, heavy fuel oil for power by building smaller-scale gas facilities. Jordan Blum, Fortune, 25 Sep. 2025 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 8 Oct. 2025.

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

Last Updated: - Updated example sentences
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