[ oil ]
/ ɔɪl /
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See synonyms for: oil / oiled / oiler / oiling on Thesaurus.com

verb (used with object)
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Idioms about oil

    pour oil on troubled waters, to attempt to calm a difficult or tense situation, as an argument.
    strike oil,
    1. to discover oil, especially to bring in a well.
    2. to have good luck, especially financially; make an important and valuable discovery: They struck oil only after years of market research.

Origin of oil

1125–75; Middle English olie, oile<Old French <Latin oleum, olīvum (olive) oil <*oleivum (cf. Deus) <dialectal Greek *élaiwon (Attic élaion), derivative of *elaíwāolive


Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use oil in a sentence

British Dictionary definitions for oil

/ (ɔɪl) /

verb (tr)

Derived forms of oil

oil-like, adjective

Word Origin for oil

C12: from Old French oile, from Latin oleum (olive) oil, from olea olive tree, from Greek elaia olive
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

Medical definitions for oil

[ oil ]

Any of numerous mineral, vegetable, and synthetic substances and animal and vegetable fats that are generally slippery, combustible, viscous, liquid or liquefiable at room temperatures, soluble in various organic solvents such as ether but not in water, and used in a great variety of products, especially lubricants and fuels.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for oil

[ oil ]

Any of a large class of viscous liquids that are typically very slippery and greasy. Oils are composed mostly of glycerides. They are flammable, do not mix with water, and include animal and vegetable fats as well as substances of mineral or synthetic origin. They are used in food, soap, and candles, and make good lubricants and fuels. See essential oil mineral oil petroleum.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Other Idioms and Phrases with oil


see banana oil; burn the midnight oil; grease (oil) someone's palm; grease (oil) the wheels; pour oil on troubled waters; strike it rich (oil).

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.