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oil

 
 
/ɔɪl/ noun [U]

Definition

FUEL a thick liquid that comes from under the Earth's surface that is used as a fuel and for making parts of machines move smoothly: an oil company an oil well
COOKING a thick liquid produced from plants or animals that is used in cooking: vegetable oil → See also crude oil → See also olive oil
(Definition of oil noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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