fossil fuel

noun

: a fuel (such as coal, oil, or natural gas) formed in the earth from plant or animal remains

fossil-fueled

ˈfä-səl-ˌfyü(-ə)ld 

adjective

Examples of fossil fuel in a Sentence

oil and other fossil fuels

Recent Examples on the Web

While the resulting hydrogen can help decarbonize industries that are difficult to electrify directly, its wider adoption has been constrained by its cost compared with hydrogen produced from fossil fuels. — Kaif Shaikh, Interesting Engineering, 9 Oct. 2026

The new material is being introduced as part of a collection of 26 pieces aimed at reducing the dependence on conventional synthetic materials derived from fossil fuels such as nylon and polyester. — Arthur Zaczkiewicz, Footwear News, 8 Oct. 2026

But Russell argued that state lawsuits can address damage in Colorado, regardless of where the fossil fuels are produced. — Arkansas Online, 6 Oct. 2026

The university was transitioning away from fossil fuels as part of its sustainability plan, including some of its dining halls. — Tony Briscoe, Los Angeles Times, 6 Oct. 2026

Word History

First Known Use

1759, in the meaning defined above

Rhymes for fossil fuel

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

Kids Definition

fossil fuel

noun

: a fuel (as coal, oil, or natural gas) that is formed in the earth from plant or animal remains