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semicircle

noun

semi·​cir·​cle ˈse-mē-ˌsər-kəl How to pronounce semicircle (audio)
ˈse-ˌmī-
-mi-
1
: a half of a circle
2
: an object or arrangement of objects in the form of a half circle
semicircular
ˌse-mē-ˈsər-kyə-lər How to pronounce semicircle (audio)
ˌse-ˌmī-
-mi-
adjective

Examples of semicircle in a Sentence

The children sat in a semicircle. The houses are built in a semicircle.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
At the conclusion of dinner chairs were moved into a semicircle facing auctioneer Michael Broadbent, the legendary British wine critic and author. Mike Desimone, Robb Report, 16 Nov. 2025 In one of the hunts, called a xingwei, horsemen armed with bows formed a vast semicircle to push wildlife ahead of them. Literary Hub, 14 Nov. 2025 Early that afternoon, the officers walked into a conference room where about a dozen relatives—including Ryan’s mother, stepfather, father, and three siblings, plus Emily’s mother and father—sat in chairs in a semicircle. Jamie Thompson, The Atlantic, 6 Nov. 2025 With a hundred or so onlookers seated in chairs positioned in a semicircle in the library lobby, the contestants took turns busting rhymes. Jeff Pearlman, Rolling Stone, 17 Oct. 2025 See All Example Sentences for semicircle

Word History

Etymology

Latin semicirculus, from semi- + circulus circle

First Known Use

1526, in the meaning defined at sense 1

Time Traveler
The first known use of semicircle was in 1526

Browse Nearby Words

Cite this Entry

“Semicircle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semicircle. Accessed 2 Dec. 2025.

Kids Definition

semicircle

noun
semi·​cir·​cle ˈsem-i-ˌsər-kəl How to pronounce semicircle (audio)
1
: half of a circle
2
: an object or arrangement of objects in the form of a half circle
semicircular adjective

More from Merriam-Webster on semicircle

Last Updated: - Updated example sentences
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