oc·tag·o·nal
(ˈ)äk¦tagənᵊl 
-taig-
: having eight sides
built a mansion in the shape of an octagon, which started quite a fashion for octagonal houses—
Time
TimeExamples of octagon in a Sentence
Recent Examples on the Web
Los Angeles Times, 9 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
After suffering back-to-back losses in the octagon, Muhammad is set to face Gabriel Bonfim in the main event of UFC Fight Night 278 on Saturday.
—Matt Moret, New York Times, 2 June 2026
Currently, an octagon is being built on the White House South Lawn for UFC Freedom 250, a June 14 cage-fighting event commemorating America's 250th anniversary.
—Danielle Kurtzleben, NPR, 30 May 2026
See All Example Sentences for octagon
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.
Noun
Construction started late last month on a massive octagon with an open overhead dome and around 5,000 arena seats.
—Los Angeles Times, 9 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
After suffering back-to-back losses in the octagon, Muhammad is set to face Gabriel Bonfim in the main event of UFC Fight Night 278 on Saturday.
—Matt Moret, New York Times, 2 June 2026
Currently, an octagon is being built on the White House South Lawn for UFC Freedom 250, a June 14 cage-fighting event commemorating America's 250th anniversary.
—Danielle Kurtzleben, NPR, 30 May 2026
See All Example Sentences for octagon
Cite this Entry
“Octagon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octagon. Accessed 12 Jun. 2026.
Copy CitationKids Definition
Love words? Need even more definitions?
Merriam-Webster unabridged
