Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “carbon”


noun [U]    /ˈkɑr·bən/
biology, chemistry a chemical element that is contained in all animals and plants , and that is an important part of other substances such as coal and oil , and exists in its pure form as diamonds and graphite
(Definition of carbon noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of carbon

Definitions of “carbon” in other dictionaries

Word of the Day

prenuptial agreement

an official document signed by two people before they get married that says what will happen to their possessions and/or children if they divorce (= officially stop being married)

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