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English definition of “oil”

oil

noun [U] (FUEL)   /ɔɪl/
a thick , liquid substance that burns and is used as fuel or as a lubricant (= substance that helps connecting parts move easily ), or the thick liquid taken from under the ground which oil, gasoline , and other products are made from: motor oil fuel / heating oil Change your car’s oil every 12,000 miles .
(Definition of oil noun (FUEL) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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