octagon

noun

oc·​ta·​gon ˈäk-tə-ˌgän How to pronounce octagon (audio)
: a polygon of eight angles and eight sides
octagonal adjective
octagonally adverb

Examples of octagon in a Sentence

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.
Since debuting in 2019, Hernandez has compiled a 9-2 record in the octagon and heads into this bout riding an eight-fight winning streak. Marley Malenfant, Austin American Statesman, 21 Feb. 2026 The Rousey-Carano fight will take place inside a hexagon (and not octagon like the UFC) cage. Tony Maglio, HollywoodReporter, 17 Feb. 2026 The octagon links give this necklace a modern look that stands out while still feeling wearable day to day. Jason Phillips, USA Today, 10 Feb. 2026 Colby Covington’s time in the octagon has been scarce. Ryan Morik, FOXNews.com, 9 Jan. 2026 See All Example Sentences for octagon

Word History

Etymology

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

First Known Use

1594, in the meaning defined above

Time Traveler
The first known use of octagon was in 1594

Browse Nearby Words

Cite this Entry

“Octagon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octagon. Accessed 27 Feb. 2026.

Kids Definition

octagon

noun
oc·​ta·​gon ˈäk-tə-ˌgän How to pronounce octagon (audio)
: a polygon with eight angles and eight sides
octagonal adjective

More from Merriam-Webster on octagon

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