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fuel oil

American

noun

an oil used for fuel, especially one used as a substitute for coal, as crude petroleum.

fuel oil British

noun

a liquid petroleum product having a flash point above 37.8°C: used as a substitute for coal in industrial furnaces, domestic heaters, ships, and locomotives

"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

Example Sentences

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fuel oil

The government says it has run out of diesel and fuel oil needed to power the generators that supplement the electricity production of its dilapidated power plants.

From Barron's ● May 18, 2026

This week the island's energy minister acknowledged that Cuba has, in essence, run out of fuel oil.

From BBC ● May 16, 2026

The average price of very low-sulfur fuel oil has risen 70% to $925 per metric ton at the world’s top ports since the war started.

From Los Angeles Times ● May 8, 2026

On a year-over-year basis, Canadians paid 26.1% more for fuel oil and other fuels last month.

From The Wall Street Journal ● Apr. 20, 2026

We spent weeks at the huge Shell Haven Refinery with a special instructor who taught us all about fuel oil and diesel oil and gas oil and lubricating oil and kerosene and gasoline.

From "Boy: Tales of a Childhood" by Roald Dahl

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023