oc·​ta·​gon | \ ˈäk-tə-ˌgän How to pronounce octagon (audio) \

Definition of octagon

: a polygon of eight angles and eight sides

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Other Words from octagon

octagonal \ äk-​ˈta-​gə-​nᵊl How to pronounce octagon (audio) \ adjective
octagonally \ äk-​ˈta-​gə-​nᵊl-​ē How to pronounce octagon (audio) \ adverb

Examples of octagon in a Sentence

Recent Examples on the Web That connection can be seen in a YouTube video showing Atlas inside the octagon schooling then-UFC heavyweight contender Francis Ngannou on how to cut angles to setup knockout shots. Anthony Stitt, Forbes, 26 May 2021 Although Khabib Nurmagomedov hasn't been inside the UFC octagon in 13 months, the life and mind of the unbeaten lightweight champion have been fully occupied. Greg Beacham, Star Tribune, 23 Oct. 2020 The 39-year-old Xenia, Ohio native owns the UFC welterweight division records for finishes in the octagon (13) and knockouts (11). Jason Hoffman, Cincinnati.com, 13 May 2020 Besides a nearly empty arena and people staying far apart from one another outside the octagon? Morgan Campbell, New York Times, 9 May 2020 Nothing as entertaining inside — and maybe even outside — the octagon. Josh Peter, USA TODAY, 19 Jan. 2020 According to one report, the cage floor and padding of the octagon where fights take place were regularly cleaned during Saturday night's proceedings. Ravi Ubha, CNN, 10 May 2020 The second Magic Lining prototype consisted of 25 motors on felt fabric, arranged in a 20-by-20 centimeter octagon that resembled a spiderweb. Courtney Linder, Popular Mechanics, 29 Apr. 2020 The new observation deck will be a 50-by-18-foot observation deck elevated by 10 feet, 6 inches above the existing octagon at the south end of the pier. al, 20 Apr. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'octagon.' 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 octagon

1594, in the meaning defined above

History and Etymology for octagon

Latin octagonum, from Greek oktagōnon, from okta- + -gōnon -gon

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Time Traveler for octagon

Time Traveler

The first known use of octagon was in 1594

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Last Updated

8 Jun 2021

Cite this Entry

“Octagon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octagon. Accessed 1 Aug. 2021.

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More Definitions for octagon



English Language Learners Definition of octagon

mathematics : a flat shape that has eight sides and eight angles


oc·​ta·​gon | \ ˈäk-tə-ˌgän How to pronounce octagon (audio) \

Kids Definition of octagon

: a flat geometric figure with eight angles and eight sides

More from Merriam-Webster on octagon

Nglish: Translation of octagon for Spanish Speakers


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