Adjacent Words

Octagon definitions

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Webster's 1828 Dictionary

OC'TAGON, n. [Gr. eight and angle.]
1. In geometry, a figure of eight sides and eight angles. When the sides and angles are equal, it is a regular octagon which may be inscribed in a circle.
2. In fortification, a place with eight bastions.

WordNet (r) 3.0 (2005)

n
1: an eight-sided polygon

Merriam Webster's

noun Etymology: Latin octagonum, from Greek oktag?non, from okta- + -g?non -gon Date: 1639 a polygon of eight angles and eight sides • octagonal adjective • octagonally adverb

Oxford Reference Dictionary

n. 1 a plane figure with eight sides and angles. 2 an object or building with this cross-section. Derivatives: octagonal adj. octagonally adv. Etymology: L octagonos f. Gk octagonos (as OCTA-, -GON)

Webster's 1913 Dictionary

Octagon Oc"ta*gon, n. [Gr. ? eight-cornered; ? (for ? eight) + ? an angle: cf.F. cctogone.] 1. (Geom.) A plane figure of eight sides and eight angles. 2. Any structure (as a fortification) or place with eight sides or angles. Regular octagon, one in which the sides are all equal, and the angles also are all equal.

Collin's Cobuild Dictionary

(octagons) An octagon is a shape that has eight straight sides. N-COUNT

Soule's Dictionary of English Synonyms

n. Eight-sided figure.