Octagon Definition

ŏktə-gŏn
octagons
noun
A plane figure with eight angles and eight sides.
Webster's New World
The definition of an octagon is an eight-sided, eight-angled figure.
An example of an octagon is the shape of a stop sign in the US.
YourDictionary

(martial arts, usually capitalized) The arena for mixed martial arts, particularly as trademarked by the UFC.

Wiktionary

Other Word Forms of Octagon

Noun

Singular:
octagon
Plural:
octagons

Origin of Octagon

  • First attested in 1656, from Latin octagonos, from Ancient Greek οκτάγωνος (oktágōnos, “eight-angled"), from ὀκτώ (octō, “eight") + γωνία (gōnía, “angle"). The adjective octagonal was first mentioned from 1571.

    From Wiktionary

  • Latin octagōnon from Greek oktagōnon from neuter of oktagōnos octagonal okta- octo- -gōnos angled –gon

    From American Heritage Dictionary of the English Language, 5th Edition

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