fuel

Fuel is anything that produces energy, power or heat. (noun)

Fuel means to give energy or power. (verb)

An example of fuel is putting gas in your car.

See fuel in Webster's New World College Dictionary

noun

any material, as coal, oil, gas, wood, etc., burned to supply heat or power
fissile material from which nuclear energy can be obtained, as in a nuclear reactor
anything that maintains or intensifies strong feeling, etc.

to supply with fuel

intransitive verb

to get fuel

Related Forms:

See fuel in American Heritage Dictionary 4

(fyo͞oˈəl)

noun

Something consumed to produce energy, especially:
a. A material such as wood, coal, gas, or oil burned to produce heat or power.
b. Fissionable material used in a nuclear reactor.
c. Nutritive material metabolized by a living organism; food.
Something that maintains or stimulates an activity or emotion: “Money is the fuel of a volunteer organization” (Natalie de Combray).