Pronunciation: (fyOO'ul),[key] —n., v.,-eled, -el•ing or (esp. Brit.)-elled, -el•ling.
—n. 1. combustible matter used to maintain fire, as coal, wood, oil, or gas, in order to create heat or power.
2. something that gives nourishment; food.
3. an energy source for engines, power plants, or reactors: Kerosene is used as jet engine fuel. 4. something that sustains or encourages; stimulant: Our discussion provided him with fuel for debate.