Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “fuel”


noun [C, U]
B1 a substance that is burned to provide heat or power: The plane ran out of fuel and had to land at sea. fuel billsFuelsPetroleum products especially when used as fuel
(Definition of fuel noun from the Cambridge Learners Dictionary © Cambridge University Press)
Add Cambridge dictionaries to your browser to your website

More Learner's Dictionary definitions for “fuel”

Definitions of “fuel” in other dictionaries

Word of the Day


a type of dark brown beer with a bitter taste

Word of the Day


Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More