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.
Currently, an octagon is being built on the White House South Lawn for UFC Freedom 250, a June 14 cage-fighting event commemorating America's 250th anniversary. Danielle Kurtzleben, NPR, 30 May 2026 The existence of the octagons has been documented previously. Reuters, NBC news, 29 May 2026 Losers often exit the octagon wobbling, smiling, fogged, concussed. David Remnick, New Yorker, 22 May 2026 Another potential boxing opponent for the Cameroonian is MVP promoter Paul himself, who stepped into the octagon to celebrate with winners on Saturday. Eduard Cauich, Los Angeles Times, 17 May 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 10 Jun. 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

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