octagon

[ok-tuh-gon, -guh n]

noun

a polygon having eight angles and eight sides.

Nearby words

  1. octa,
  2. octa-,
  3. octachord,
  4. octad,
  5. octadecanoic acid,
  6. octagon house,
  7. octagon scale,
  8. octagonal,
  9. octagonally,
  10. 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

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

[ŏktə-gŏn′]

A polygon having eight sides.
Related formsoctagonal adjective (ŏk-tăgə-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.