Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “cancer”

cancer

noun uk   /ˈkæn.sər/ us    /-sɚ/
B1 [C or U] a serious disease that is caused when cells in the body grow in a way that is uncontrolled and not normal, killing normal cells and often causing death: He died of liver cancer. cancer of the cervix/stomach breast/bowel/lung cancer cancer cells a cancer patient It was a secondary cancer.
See also
Cancer
[C] a harmful activity that spreads quickly: Drug abuse is a cancer which is destroying our society.Difficult things and peoplePreventing and impeding
cancerous
adjective uk   /-əs/ us  
a cancerous growth/tumourCancer
(Definition of cancer noun from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of cancer?
Add Cambridge dictionaries to your browser to your website

More meanings of “cancer”

Definitions of “cancer” in other dictionaries

Word of the Day

sling

to throw or drop something carelessly

Word of the Day

Blog

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