cancer

noun

can·​cer ˈkan(t)-sər How to pronounce cancer (audio)
1
capitalized
a
: a northern zodiacal constellation between Gemini and Leo
b(1)
: the fourth sign of the zodiac in astrology see Signs of the Zodiac Table
(2)
: one born under the sign of Cancer
I'm a Taurus, but my best friend is a Cancer.
2
[Latin, crab, cancer]
a
: a malignant tumor of potentially unlimited growth that expands locally by invasion and systemically by metastasis
b
: an abnormal bodily state marked by such tumors
3
: something evil or malignant that spreads destructively
the cancer of hidden resentmentIrish Digest
4
a
: an enlarged tumorlike plant growth (such as that of crown gall)
b
: a plant disease marked by such growths
cancerous
ˈkan(t)s-rəs How to pronounce cancer (audio)
ˈkan(t)-sə-
adjective
cancerously adverb

Did you know?

The Latin word cancer, meaning “crab,” was also given as a name to several diseases. One of the diseases was the abnormal, spreading mass of tissue we call a tumor. A possible explanation for this extended use of cancer is that the Romans thought some tumors looked like many-legged crabs. A French descendant of this Latin word was borrowed into English as canker. It is now applied to several plant and animal disorders. In the 14th century the Latin word cancer in the sense of “tumor” was borrowed directly into English, giving us our modern spelling and sense.

Examples of cancer in a Sentence

He was diagnosed with cancer. She learned that she has cancer. Eating certain foods may help reduce the risk of cancer. Advanced cancers are more difficult to treat. I'm a Taurus, but my best friend is a Cancer.
Recent Examples on the Web It’s been about a month since Olivia Munn shared her breast cancer diagnosis with the world. Jenna Ryu, SELF, 17 Apr. 2024 Last November, Doherty spoke exclusively to PEOPLE about her Stage 4 breast cancer diagnosis. Angel Saunders, Peoplemag, 17 Apr. 2024 Mancini seemed to have a charmed life and career, except for dying at the relatively young age of 70 of pancreatic cancer. Paul Grein, Billboard, 16 Apr. 2024 Christensen, a dogged reporter beloved by colleagues for his wry humor, collegiality, graceful writing and incisive mind, but above all his humility, died of cancer Monday at his home in Long Beach. Doug Smith, Los Angeles Times, 16 Apr. 2024 The real-life Godfrey — the acclaimed author Keough portrays in the show — died of cancer just weeks before filming began, and the cast pointed to her book as their guiding light throughout the series. Kirsten Chuba, The Hollywood Reporter, 16 Apr. 2024 This can result in lung cancer, chronic bronchitis and kidney disease. Eduardo Cuevas, USA TODAY, 16 Apr. 2024 The original structure, designed by Charles Coolidge Haight in French chateau style with English Gothic trim, served as the New York Cancer Hospital, a cancer treatment and research institution. Emma Reynolds, Robb Report, 15 Apr. 2024 William Kidston, a three-time Emmy-winning photographer who worked in Hollywood for decades, died March 22 of prostate cancer at his home in Denver, publicist Roger Neal announced. Mike Barnes, The Hollywood Reporter, 5 Apr. 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'cancer.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Middle English, from Latin (genitive Cancri), literally, crab; akin to Greek karkinos crab, cancer

First Known Use

14th century, in the meaning defined at sense 1a

Time Traveler
The first known use of cancer was in the 14th century

Dictionary Entries Near cancer

Cite this Entry

“Cancer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cancer. Accessed 23 Apr. 2024.

Kids Definition

cancer

noun
can·​cer ˈkan(t)-sər How to pronounce cancer (audio)
1
capitalized : a group of stars between Gemini and Leo usually pictured as a crab
2
capitalized
a
: the fourth sign of the zodiac see zodiac
b
: a person whose sign of the zodiac is Cancer
3
: a tumor that tends to spread locally and to other parts of the body and often causes death if not treated
also : an abnormal state marked by such tumors
4
: a dangerous evil that destroys slowly
cancerous adjective
Etymology

Middle English Cancer "'Crab' star group," from Latin cancer "crab, cancer (disease)"; sense 3 directly from Latin cancer "crab, cancer" — related to canker, chancre

Word Origin
The Latin word cancer, meaning "crab," was also given as a name to several diseases. One of the diseases was the abnormal, spreading mass of tissue we call a tumor. A possible explanation for this extended use of cancer is that the Romans thought some tumors looked like many-legged crabs. A French descendant of this Latin word was borrowed into English as canker. It is now applied to several plant and animal disorders. In the 14th century the Latin word cancer in the sense of "tumor" was borrowed directly into English, giving us our modern spelling and sense.

Medical Definition

cancer

noun
can·​cer ˈkan(t)-sər How to pronounce cancer (audio)
1
: a malignant tumor of potentially unlimited growth that expands locally by invasion and systemically by metastasis
2
: an abnormal state marked by a cancer
cancerous adjective
Last Updated: - Updated example sentences
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