having eight angles and eight sides.
Origin of octagonal
1565–75; octagonRelated formsoc·tag·o·nal·ly, adverb
, replacing earlier octogonal
< New Latin octōgōnālis,
equivalent to octō- octo-
+ Greek gōn(ía
) angle + -ālis -al1
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for octagonal
Historical Examples of octagonal
Over the octagonal window, too, such draperies fell in stately lines.
He sprang to the octagonal window, even as Dick took possession of the pistol.
The drum dome is octagonal, with eight ribs and as many windows.
On the other sides of the octagonal pavilion the other assistants are busy "closing up."
They are all round, though one belongs to an octagonal shaft.
British Dictionary definitions for octagonal
Derived Formsoctagonally, adverb
having eight sides and eight angles
of or relating to an octagon
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for octagonal
Online Etymology Dictionary, © 2010 Douglas Harper
Related formsoctagonal adjective (ŏk-tăg′ə-nəl)
A polygon having eight sides.
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.