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.
The food arrived on a mottled brown ceramic plate, its inexact edges forming something between a circle and an octagon. Bill Addison, Los Angeles Times, 28 Mar. 2026 The 37-year-old has been in the octagon more than a couple of dozen times and holds the record for the most knockouts in the UFC lightweight division. Ashley Portillo, CBS News, 7 Mar. 2026 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 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 2 Apr. 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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