fossil fuels

NOUN

fuel derived from prehistoric organisms

Synonyms

WEAK

hydrocarbon deposit nonrenewable energy nonrenewable fuel source

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

He said countries big and small remained in some way dependent on fossil fuels -- including Australia, a major coal and gas exporter, yet highly reliant on imports for petrol, diesel and other fuels.

From Barron's • Jun. 8, 2026

Airlines so far have favored these “drop-in fuels,” because they are chemically identical to fossil fuels and work with traditional engines.

From The Wall Street Journal • Jun. 2, 2026

When used as a fuel, it produces only water and heat rather than carbon dioxide and other pollutants associated with fossil fuels.

From Science Daily • Jun. 2, 2026

Early statistics show the war has spurred explosive demand for electric vehicles and other energy sources that don’t use fossil fuels.

From Barron's • May 28, 2026

It was grown without the help of fossil fuels, pesticides, or chemical fertilizers.

From "The Omnivore's Dilemma" by Michael Pollan