semi·​cir·​cle | \ ˈse-mē-ˌsər-kəl How to pronounce semicircle (audio) , ˈse-ˌmī-, -mi- \

Definition of semicircle

1 : a half of a circle
2 : an object or arrangement of objects in the form of a half circle

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Other Words from semicircle

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 The 63-year-old upturns 15 buckets and several pots and pans, places them in a Jenga-like semicircle and lets his drumsticks fly. Heather Knight, San Francisco Chronicle, 17 Sep. 2021 That’s a semicircle of 88 cameras in which NBC can capture a swing from virtually every angle in Matrix-like fashion. Sam Farmer, Los Angeles Times, 16 June 2021 Henderson wrangled a group of ten kayakers into a semicircle for a crash course in paddle technique. Rachel Syme, The New Yorker, 24 May 2021 Police officers in dark uniforms stationed on the edges of Estadio Cuscatlán’s field formed a semicircle with their backs turned to the 18-year-old attacker, shields raised to intercept projectiles tossed over tall fences., 3 Sep. 2021 At the first break in play after James and Westbrook took their seats, a group of photographers formed a semicircle in front of them. Andrew Greif, Los Angeles Times, 14 Aug. 2021 Those were the words that unfastened the tight semicircle of people surrounding the boy with his back against the wall. Seija Rankin,, 20 Aug. 2021 In the dining area of a local grocery store, the furniture has been cleared to make room for a semicircle of folding tables covered in tan butcher paper. Caroleine James, The Salt Lake Tribune, 30 June 2021 In the early years of the excavation, archaeologists uncovered a semicircle of stones that Leakey and Simpson interpreted as a hearth where humans had huddled, the earliest evidence of domestic fire in the New World. Gina Ferazzi, Los Angeles Times, 14 July 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'semicircle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of semicircle

1526, in the meaning defined at sense 1

History and Etymology for semicircle

Latin semicirculus, from semi- + circulus circle

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Time Traveler for semicircle

Time Traveler

The first known use of semicircle was in 1526

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Dictionary Entries Near semicircle



semicircular canal

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Statistics for semicircle

Last Updated

19 Sep 2021

Cite this Entry

“Semicircle.” Dictionary, Merriam-Webster, Accessed 24 Sep. 2021.

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More Definitions for semicircle



English Language Learners Definition of semicircle

: half of a circle
: an arrangement of people or things that forms a semicircle


semi·​cir·​cle | \ ˈse-mi-ˌsər-kəl How to pronounce semicircle (audio) \

Kids Definition of semicircle

: half of a circle

More from Merriam-Webster on semicircle

Thesaurus: All synonyms and antonyms for semicircle


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