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.
Prada Galleria now includes a new subterranean passage under the landmarked 19th-century shopping arcade that connects the women’s store with the men’s one, linking two sides of the central octagon. — Luisa Zargani, Footwear News, 22 Oct. 2026 And McCauley sees parallels between Apodaca’s success at KPMG and her victories in the octagon. — Kyle Newman, Denver Post, 11 Sep. 2026 Hernandez is a grappler in the octagon who can unleash crushing blows with his fists, elbows and legs. — Joe Davidson, Sacbee.com, 21 Aug. 2026 Barboza, who hadn't secured a win since October 2023 and had taken significant damage in recent bouts, laid his gloves down in the octagon. — Brian Mazique, Forbes.com, 16 Aug. 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 29 Oct. 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
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