definitions

octagon

[ ok-tuh-gon, -guh n ]
/ ˈɒk təˌgɒn, -gən /
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SEE MORE SYNONYMS FOR octagon ON THESAURUS.COM

noun

a polygon having eight angles and eight sides.

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RELATED WORDS

octave, octad, octet

Nearby words

octa, octa-, octachord, octad, octadecanoic acid, octagon, octagon house, octagon scale, octagonal, octagonally, octahedral

Origin of octagon

1650–60; < Latin octagōnon < Greek oktágōnon, noun use of neuter of oktágōnos octangular; see octa-, -gon
Also called octangle.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for octagon

British Dictionary definitions for octagon

octagon

less commonly octangle

/ (ˈɒktəɡən) /

noun

a polygon having eight sides

Word Origin for octagon

C17: via Latin from Greek oktagōnos, having eight angles
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 octagon

octagon

n.

1650s, from Latin octagonos, from Greek oktagononos, literally "eight-angled," from okta- comb. form of okto "eight" (see eight) + gonia "angle," related to gony "knee" (see knee (n.)). Also octogon (1650s), from French octogone.

Online Etymology Dictionary, © 2010 Douglas Harper

Science definitions for octagon

octagon

[ ŏk′tə-gŏn′ ]

A polygon having eight sides.
Related formsoctagonal adjective (ŏk-tăg′ə-nəl)
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Culture definitions for octagon

octagon

A polygon having eight sides.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.