n. & v.
n. 1 material, esp. coal, wood, oil, etc., burnt or used as a source of heat or power. 2 food as a source of energy. 3 material used as a source of nuclear energy. 4 anything that sustains or inflames emotion or passion.
v. (fuelled, fuelling; US fueled, fueling) 1 tr. supply with fuel. 2 tr. sustain or inflame (an argument, feeling, etc.) (drink fuelled his anger). 3 intr. take in or get fuel. fuel cell a cell producing an electric current direct from a chemical reaction. fuel element an element of nuclear fuel etc. for use in a reactor. fuel injection the direct introduction of fuel under pressure into the combustion units of an internal-combustion engine. fuel oil oil used as fuel in an engine or furnace.
[ ME f. AF fuaille, fewaile, OF fouaille, ult. f. L focus hearth ]