octagon

noun

oc·​ta·​gon ˈäk-tə-ˌgän How to pronounce octagon (audio)
: a polygon of eight angles and eight sides
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
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.
During the broadcast, an announcer spoke over the image of a fighter walking to the octagon. — Oskar Garcia, New York Times, 15 June 2026 At the same time, the Ellisons have retained Jeffrey Kessler to get in the legal octagon for them if the state throws down. — Dominic Patten, Deadline, 15 June 2026 An octagon arena is near completion on the South Lawn of the White House for the UFC fight on his birthday. — Josh Meyer, USA Today, 8 June 2026 Fighters made cinematic entrances out of the White House and into the octagon, flanked by first responders and veterans, even including a Medal of Honor recipient. — Kayla Hayempour, NBC news, 15 June 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

Rhymes for octagon

See All Rhymes for octagon

Browse Nearby Words

octadrachm
octagon
octagonal
See all Nearby Words

Cite this Entry

“Octagon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octagon. Accessed 7 Jul. 2026.

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Kids Definition

octagon

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

More from Merriam-Webster on octagon

Nglish: Translation of octagon for Spanish Speakers

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