Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English


English definition of “cancer”


noun [C/U] (DISEASE)   /ˈkæn·sər/
a disease in which cells in the body grow without control, or a serious medical condition caused by this disease: [U] He died from cancer of the stomach. cancerous    /ˈkæn·sər·əs/ adjective Surgeons removed a cancerous growth from her lung.
(Definition of cancer noun (DISEASE) from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of cancer

More American English definitions for “cancer”

Definitions of “cancer” in other dictionaries

Word of the Day

work out

to exercise in order to improve the strength or appearance of your body

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