1
: a rotating or sliding piece (such as an eccentric wheel or a cylinder with an irregular shape) in a mechanical linkage used especially in transforming rotary motion into linear motion or vice versa
2
: camshaft
an engine with a single overhead cam

cam

2 of 3

noun (2)

: camera
especially : video camera

CAM

3 of 3

abbreviation

1
computer-aided manufacturing
2
complementary and alternative medicine

Examples of cam in a Sentence

Recent Examples on the Web
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Noun
They’re protected from sharks by all the kelp growth in that spot, explained a volunteer docent who also shared that the beach’s live cam gets rather steamy in January. — David G. Allan, CNN Money, 22 Sep. 2026 The videos came from an off-duty officer who captured part of the encounter between ICE and Garcés Pérez, as well as the sound of three gunshots, using his personal dash cam and cellphone. — Nicole Acevedo, NBC news, 22 Sep. 2026 Fans can follow the competition through Katmai's famous bear cams and cast ballots in each matchup during the tournament. — Saman Shafiq, USA Today, 22 Sep. 2026 The live-cams captured the young brown bear cub being killed and eaten by #806 as her spring cubs looked on. — Popular Science Team, Popular Science, 22 Sep. 2026 See All Example Sentences for cam

Word History

Etymology

Noun (1)

perhaps from French came, from German Kamm, literally, comb, from Old High German kamb

First Known Use

Noun (1)

1777, in the meaning defined at sense 1

Noun (2)

1969, in the meaning defined above

Time Traveler
The first known use of cam was in 1777

Browse Nearby Words

Cite this Entry

“Cam.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cam. Accessed 28 Sep. 2026.

Kids Definition

: a device by which circular motion may be transformed into stop-and-start or back-and-forth motion

cam

2 of 2 noun
Etymology

Noun

perhaps from French came "cam," from German Kamm, literally, "comb"

Medical Definition

CAM

abbreviation
1
2
complementary and alternative medicine
According to a 2002 survey by the National Center for Health Statistics, 36 percent of adults in the United States used some form of complementary and alternative medicine (CAM), including naturopathy, relaxation techniques, chiropractic, yoga, massage, and diets.—In-Sung Yoo, The News Journal (Wilmington, Delaware)

Geographical Definition

river 40 miles (64 kilometers) long in Cambridgeshire, east central England, flowing into the Ouse River

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