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English definition of “fuel”

fuel

noun     /ˈfjuːəl/
[C or U] NATURAL RESOURCES a substance which is used to provide heat or power, usually by being burned: oil, gas and other kinds of fuel nuclear fuel fossil fuelsfuel costs/prices Domestic fuel costs have risen sharply over the past few months. The new exhaust system, it is claimed, will lower fuel consumption.
[U] anything that keeps people's ideas or feelings active, or makes them stronger: The news reports were designed to add fuel to the debate over interest rates.
(Definition of fuel noun from the Cambridge Business English Dictionary © Cambridge University Press)
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