Did you know?

Click any word in a definition or example to find the entry for that word

cancer

 - definition
 
 
 
Close

What are red words?

90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.

Close

Thesaurus

The thesaurus of synonyms and related words is fully integrated into the dictionary entries. Click on the T button in an entry to review the synonyms and related words for that meaning.

more
noun cancer pronunciation in British English /ˈkænsə(r)/ 
Word Forms
Close
singularcancer
pluralcancers

Related dictionary definitions

  1. 1
    [countable/uncountable] a serious illness caused by a group of cells in the body increasing in an uncontrolled way. Cancer is often treated by chemotherapy (=special drugs) or by radiotherapy

    Some cancers are easier to treat than others.

    cancer cells/patients

    lung/breast/prostate cancer:

    He died of lung cancer.

    cancer of the cervix/prostate/colon:

    She was diagnosed with cancer of the cervix.

derived word

cancerous

adjective

cancerous cells

Open Dictionary

selfie stick

an expandable stick which you attach to a mobile phone or camera to help you take a selfie …

add a word

Blog

A must for anyone with an interest in the changing face of language. The Macmillan Dictionary blog explores English as it is spoken around the world today.

global English and language change from our blog