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.
Barber eventually stood and moved to the center of the octagon for Grasso to raise her hand. Kyle Newman, Denver Post, 31 Mar. 2026 The error went unnoticed until Fortune had exited the octagon and headed toward the tunnel. Chantz Martin, FOXNews.com, 29 Mar. 2026 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 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 7 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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