Longman Dictionary of Contemporary English homepage

Date: 1100-1200
Language: Old French
Origin: fouaille, from feu 'fire', from Latin focus; FOCUS1

fuel

1 noun
     
fu‧el1 S2 W2
[uncountable and countable] a substance such as coal, gas, or oil that can be burned to produce heat or energy:
The plane was running low on fuel.
Coal is one of the cheapest fuels.
the car's fuel consumption (=how much fuel it uses to travel a particular distance)
an empty fuel tank

➔ add fuel to the fire/flames

at add (9)
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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