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heavy oil

British  

noun

  1. a hydrocarbon mixture, heavier than water, distilled from coal tar

"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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The deal would mark Continental’s first foray into developing heavy oil.

From The Wall Street Journal ● Sep. 16, 2026

“The issue is these Orinoco Belt heavy oil projects are like deep water developments. They are capital intensive and require long-term planning, and an ability to hold your breath for a while.”

From The Wall Street Journal ● Jul. 30, 2026

Several other Asian countries that are heavy oil importers enacted energy-saving measures early on.

From MarketWatch ● Jun. 9, 2026

Monday’s fire was at one of its two diesel-treating units, which are designed to help the refinery convert the heavy oil into ultra-low-sulfur diesel while still meeting environmental specifications.

From Barron's ● Mar. 24, 2026

It was a big, light room in a wing of the house, all the windows thrown open to air out the heavy oil and turpentine smells.

From "How the García Girls Lost Their Accents" by Julia Alvarez

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