Gas, carbs, coal, oil

noun

1. A material used to produce heat or power by burning
2. Nutritive material
3. A material from which atomic energy can be liberated especially in a reactor
4. A source of sustenance or incentive reinforcement

verb

1. To provide with fuel
2. Support, stimulate

   "movement is fueled by massive grants-in-aid"

3. To take in fuel

noun

1. A device that continuously changes the chemical energy of a fuel (such as hydrogen) and an oxidant directly into electrical energy

noun

1. A usually electronically-controlled system for injecting a precise amount of atomized fuel into the cylinders or the intake airstream of an internal combustion engine

noun

1. An oil that is used for fuel and that usually has a higher flash point than kerosene

noun

1. Use of less fuel

   "cars with better fuel economy"

phrasal verb

1. To put fuel into a car, airplane, etc.

   "They fueled up for their long journey home."

noun

1. A fuel for internal combustion engines that is derived partly or wholly from a source other than petroleum and that is less damaging to the environment than traditional fuels

   "alternative fuel vehicles"

noun

1. A heavy mineral oil used as fuel in diesel engines

adjective

1. Designed to run on either traditional gasoline or a gasoline/alcohol blend (such as gasohol)

   "In the past few years, Brazil's bioethanol industry has sprouted new wings thanks to higher petrol prices and flex-fuel cars, which can sense different mixtures of petrol and ethanol and adjust their workings accordingly."