SYNONYMS | WORD ORIGIN noun combustible matter used to maintain fire, as coal, wood, oil, or gas, in order to create heat or power. something that gives nourishment; food. an energy source for engines, power plants, or reactors: Kerosene is used as jet engine fuel. something that sustains or encourages; stimulant: Our discussion provided him with fuel for debate. verb (used with object), fu·eled, fu·el·ing or ( especially British) fu·elled, fu·el·ling. verb (used without object), fu·eled, fu·el·ing or ( especially British) fu·elled, fu·el·ling. to obtain or replenish fuel. Origin of fuel 1300–50; Middle English fuel(le
Old French feuaile
Vulgar Latin *focālia,
neuter plural of
of the hearth, fuel. See
-al 1 Related forms fu·el·er; ( especially British) fu·el·ler, noun de·fu·el, verb (used with object), de·fu·eled, de·fu·el·ing or ( especially British) de·fu·elled, de·fu·el·ling. non·fu·el, adjective un·fu·eled; ( especially British) un·fu·elled, adjective well-fu·eled; ( especially British) well-fu·elled, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for defuelling noun any substance burned as a source of heat or power, such as coal or petrol the material, containing a fissile substance, such as uranium-235, that produces energy in a nuclear reactor a substance that releases energy in a fusion reactor something that nourishes or builds up emotion, action, etc verb fuels, fuelling or fuelled or US fuels, fueling or fueled to supply with or receive fuel Derived Forms fueller or US fueler, noun Word Origin for fuel
C14: from Old French
feuaile, from feu fire, ultimately from Latin focus fireplace, hearth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for defuelling n.
early 14c., from Old French
foaile "bundle of firewood," from Vulgar Latin legal term *focalia "right to demand material for making fire," neuter plural of Latin focalis "pertaining to a hearth," from focus "hearth" (see focus). Figurative use from 1570s. v.
fuel (n.). Related: Fueled; fueling.
Online Etymology Dictionary, © 2010 Douglas Harper
A substance that produces useful energy when it undergoes a chemical or nuclear reaction. Fuel such as coal, wood, oil, or gas provides energy when burned. Compounds in the body such as glucose are broken down into simpler compounds to provide energy for metabolic processes. Some radioactive substances, such as plutonium and tritium, provide energy by undergoing nuclear fission or fusion.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Idioms and Phrases with defuelling
see add fuel to the fire.
The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.