Any combustible material, especially petroleum-based products and wildland fuels. 

  Any material substance that can be consumed to supply heat or power. Included are petroleum, coal, and natural gas (the fossil fuels), and other consumable materials, such as uranium, biomass, and h [..]

A substance that can be used to produce heat.

See 'nuclear fuel'.

High-temperature resistant nuclear fuel in ceramic form, e.g. oxides, carbides, nitrides.

1590s, "feed or furnish with fuel," literal and figurative, from fuel (n.). Intransitive sense "to get fuel" (originally firewood) is from 1880. Related: Fueled; fueling.

c. 1200, feuel, feul "fuel, material for burning," also figurative, from Old French foaille "fuel for heating," from Medieval Latin legal term focalia "right to demand materia [..]

Combustible material. Includes, vegetation, such as grass, leaves, ground litter, plants, shrubs and trees, that feed a fire. (See Surface Fuels.)

Fuel [N]Almost every kind of combustible matter was used for fuel, such as the withered stalks of herbs ( Matthew 6:30 ), thorns ( Psalms 58:9 ; Eccl 7:6 ), animal excrements ( Ezekiel 4:12-15 ; Ezeki [..]

material that provides power or energy.

provide with a combustible substance that provides energy; "fuel aircraft, ships, and cars" a substance that can be consumed to produce energy; "more fuel is nee [..]

anything used to make head, such as coal, gas or wood

Almost every kind of combustible matter was used for fuel, such as the withered stalks of herbs (Matt. 6:30), thorns (Ps. 58:9; Eccl. 7:6), animal excrements (Ezek. 4:12-15; 15:4, 6; 21:32). Wood or c [..]

Material such as oil, gas, wood, or coal that is burned as a source of energy and power.

the reducer; any combustible material, solid, liquid or gas. Most solids and liquids must vaporize before they will burn.

Any material that will maintain combustion under specified environmental conditions.

Oxygen and the material that combines with oxygen and burns. Logs, wood pellets, charcoal, liquid propane, and natural gas are common fuels for barbecue and grilling.

According to 15 USCS § 2702 (3), [Title 15. Commerce and Trade; Chapter 54. Automotive Propulsion Research and Development] the term fuel means “any energy source capable of propelling an automobile.” [..]

(n) a substance that can be consumed to produce energy(v) provide with a combustible substance that provides energy(v) provide with fuel(v) take in fuel, as of a ship(v) stimulate

 Any substance that can be burned to produce heat; also, materials that can be fissioned in a chain reaction to produce heat.

Anything consumed to produce energy, especially a material such as coal, natural gas or oil burned to produce heat.

 Any substance that stores potential energy that can be released as heat energy, most often through combustion.

Anything consumed to produce energy. Conventional fuels (coal, oil, natural gas, wood); hydro (water), solar (sun), nuclear, wind, geothermal (derived from heat contained in earth).

Adding fuel to fire. Saying or doing something to increase the anger of a person already angry. The French say, “pouring oil on fire.”

Any substance that can be burned to produce heat; also, materials that can be fissioned in a chain reaction to produce heat.

A material that may be used to produce heat or generate power by combustion.

Fuel is any solid, liquid or gaseous substance or material that can be combined with an oxidant (also known as an oxidizer or combustion agent) during combustion reactions. This reaction generates lar [..]

a substance containing one or more combustible components, used for generating heat.

Any substance that can be burned to produce heat; also, materials that can be fissioned in a chain reaction to produce heat.

Material burned in a combustion chamber to release heat.

The type of fuel used to power the vehicle (petrol, diesel, electric, LPG etc)

n. combustible

is a material which is consumed, giving up its molecularly stored energy which is then used for other purposes. e.g. to do work (run a machine).

Any combustible hydrocarbon deposit formed from the remains of prehistoric organisms. Examples are Petroleum, Coal, and Natural Gas.

A material that is burned to produce light (fuels used for lighthouses included wood, lard, whale oil, tallow, kerosene). Today, besides electricity and acetylene gas, solar power is also used.

Any material that can be used to generate energy to produce mechanical work in a controlled manner. For the purposes of this document, Fuel refers to Aviation Fuel.

A substance that when combined with an oxidizer burns to produce thrust in rockets.

Fuel and oil

Fuel and oil

Any substance that can be burned to produce heat; also, materials that can be fissioned in a chain reaction to produce heat.

A substance that can be used to produce heat.

A material used to produce heat or power by burning.

Any substance which is used for producing heat energy, either by means of the release of its chemical energy by combustion or its nuclear energy by nuclear fission.