fuel

1 of 2

noun

fu·​el ˈfyü(-ə)l 

often attributive

1

a

: a material used to produce heat or power by burning

b

: nutritive material

c

: a material from which atomic energy can be liberated especially in a reactor

2

: a source of sustenance or incentive : reinforcement

fuel

2 of 2

verb

fueled or fuelled; fueling or fuelling

transitive verb

1

: to provide with fuel

2

: support, stimulate

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

—Allen Schick

intransitive verb

: to take in fuel

—often used with up

Synonyms of fuel

Noun

• energy
• power

Examples of fuel in a Sentence

Noun

I had the fuel pump replaced on my car.

These latest scandals will provide further fuel for his political opponents.

These latest accusations will only add fuel to the controversy.

The controversy continues to rage, and these latest accusations will only add fuel to the fire.

Verb

The airplanes were fueled in midair.

The criticism she has faced has only fueled her determination to succeed.

Inflation was fueled by high prices.

The strong economy has fueled the construction of new homes.

Recent Examples on the Web

Noun

Meanwhile, Trump’s decision to go to war with Iran has roiled the global energy markets and sent the cost of gas and jet fuel soaring. —Kyle Feldscher, CNN Money, 11 June 2026

According to Susana Reyes, Vice President for Chamber and Plant Design, this liquid barrier absorbs neutron flux, generates tritium fuel, and transfers heat while constantly renewing itself. —Aman Tripathi, Interesting Engineering, 11 June 2026

Verb

Our machine learning algorithm and subsequent simulations are fueled by data, expert knowledge and statistical models. —Achim Zeileis, Fortune, 12 June 2026

That points to SpaceX's belief that its AI capabilities will fuel its growth. —Mary Cunningham, CBS News, 12 June 2026

Word History

Etymology

Noun

Middle English fewel, from Anglo-French fuail, feuaile, from Vulgar Latin *focalia, from Latin focus hearth

First Known Use

Noun

13th century, in the meaning defined at sense 1a

Verb

1593, in the meaning defined at transitive sense 1

Phrases Containing fuel

• alternative fuel
• diesel fuel
• flex-fuel
• fossil fuel
• fuel cell
• fuel economy
• fuel injection
• fuel oil
• fuel up

Rhymes for fuel

• accrual
• nonfuel
• refuel
• renewal
• biofuel
• contextual
• nonrenewal
• nonsexual
• unusual
• cruel
• dual
• duel

Kids Definition

fuel

1 of 2 noun

fu·​el ˈfyü(-ə)l 

1

a

: a material used to produce heat or power by burning

b

: a material from which atomic energy can be produced especially in a reactor

2

: a source of energy

fuel

2 of 2 verb

fueled or fuelled; fueling or fuelling

: to supply with or take in fuel