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.
Colby Covington’s time in the octagon has been scarce. Ryan Morik, FOXNews.com, 9 Jan. 2026 Last year, Joshua took on another boxing novice in former UFC heavyweight champion Francis Ngannou, a man known for his toughness and destructive power in the octagon. Sarah Shephard, New York Times, 19 Nov. 2025 Audiences aren't rushing to the octagon to see Sydney Sweeney's sports biopic turn. Taijuan Moorman, USA Today, 10 Nov. 2025 This groundbreaking structure comprises eight triangular steel sections that roll up to a perfect octagon in 2-3 minutes. Atharva Gosavi, Interesting Engineering, 16 Oct. 2025 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 31 Jan. 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

Last Updated: - Updated example sentences
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