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Also see:
pump
WordReference Random House Learner's Dictionary of American English © 2026 fu•el /ˈfyuəl/USA pronunciation
n., v., -eled, -el•ing or (esp. Brit. ) -elled, -el•ling. n.
Energy matter that can be burned to create heat or power, such as coal, wood, oil, or gas: [ uncountable ] ran out of fuel.[ countable ] Kerosene and gas are fuels.
something that maintains, encourages, or stimulates:[ uncountable ] The proposed amendment is fuel for debate.
v.
Energy to supply with fuel:[ ~ + object] fueled the plane.
to obtain or replenish fuel:[ no object] The jet fighter fueled in midair.
[ ~ + object] toencourage or stimulate:
to fuel suspicion.
WordReference Random House Unabridged Dictionary of American English © 2026 fu•el
(fyo̅o̅′ əl),USA pronunciation n., v., -eled, -el•ing or (esp. Brit. ) -elled, -el•ling. n.
Energy combustible matter used to maintain fire, as coal, wood, oil, or gas, in order to create heat or power.
something that gives nourishment; food.
Chemistry, Energy an energy source for engines, power plants, or reactors:Kerosene is used as jet engine fuel.
something that sustains or encourages; stimulant:Our discussion provided him with fuel for debate.
v.t.
Energy to supply with fuel.
v.i.
to obtain or replenish fuel.
Vulgar Latin *focālia, neuter plural of *focālis of the hearth, fuel. See focus, -al 1 Old French feuaile Middle English fuel (le ), feuel 1300–50
fu′ el•er, fu′ el•ler , n.
4.See corresponding entry in Unabridged ammunition, sustenance, impetus, stimulus.
Collins Concise English Dictionary © HarperCollins Publishers::
fuel / fjʊəl / any substance burned as a source of heat or power, such as coal or petrol the material, containing a fissile substance, such as uranium-235, that produces energy in a nuclear reactor something that nourishes or builds up emotion, action, etc (fuels , fuelling , fuelled ) (fuels , fueling , fueled ) to supply with or receive fuel Etymology: 14th Century: from Old French feuaile , from feu fire, ultimately from Latin focus fireplace, hearth