octagonal
Americanadjective
adjective
-
having eight sides and eight angles
-
of or relating to an octagon
Other Word Forms
- octagonally adverb
Etymology
Origin of octagonal
1565–75; octagon + -al 1, replacing earlier octogonal < New Latin octōgōnālis, equivalent to octō- octo- + Greek gōn ( ía ) angle + -ālis -al 1
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Of all the historical monuments in Puglia, it is the inland landmark of Castel del Monte, a hilltop octagonal castle, that has become a national symbol, finding its way onto stamps and money.
From The Wall Street Journal • Oct. 26, 2025
Some of the findings are "unique" for South America, he explains, pointing to the octagonal and rectangular platforms arranged together.
From BBC • Jan. 11, 2024
The octagonal wooden structure dates to 1842, although a lighthouse has been at the site since 1768.
From Washington Times • May 26, 2023
On Sunday, an octagonal structure with strings hanging off it and no evident payload was hit over Lake Huron.
From New York Times • Feb. 14, 2023
The third kind were large wooden houses with broad porches that ran around the buildings; they had odd shapes, round towers, octagonal bays, balconies.
From "Homecoming" by Cynthia Voigt
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
