American Heritage® Dictionary of the English Language, Fourth Edition
- n. A polygon with eight sides and eight angles.
Century Dictionary and Cyclopedia
- n. In geometry, a figure of eight angles and eight sides. When the sides and angles are equal, it is a regular octagon.
- n. In fortification, a work with eight bastions.
- n. A gold coin of octagonal shape, of the value of 50 dollars, issued in 1851 by the United States assay-office in San Francisco.
- n. geometry A polygon with eight sides and eight angles.
- n. martial arts, usually capitalized The arena for mixed martial arts, particularly as trademarked by the UFC.
GNU Webster's 1913
- n. (Geom.) A plane figure of eight sides and eight angles.
- n. Any structure (as a fortification) or place with eight sides or angles.
- n. an eight-sided polygon
“The octagon was a room perhaps one hundred feet across and thirty feet high.”
“The octagon is an eight-sided figure, the intervening shape between the circle and the square.”
“The reason why it was called by this name was, that the principal sitting-room in the house was built in the form of an octagon, that is, instead of having four sides, as a room usually has, this room had eight sides.”
“Fergusson has pointed out that the roof of the octagon is the only Gothic dome in existence.”
“Brendhan pointed out a majority of the talent at 205 lbs. resides within the UFC, but there's one man who doesn't call the octagon his home and that man is”
“Watching he and Coleman sloshing around the octagon is a joke.”
“These are placed at the intersection of a system of semicircles, of which the sixteen columns on the sides of the octagon are the centres.”
“The fad for building 8 sided houses was the result of a book entitled The octagon House, A Home For All, written by a phrenologist named Orson Fowler in 1852.”
“This "octagon" house in Washington was occupied by President Madison while the White”
“Colorado in 1993, when boxers, wrestlers and ju-jitsu champions held free-for-all scraps in the '' octagon '', a caged, eight-sided ring.”
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a collection of words we study in pre-algebra
Gem cuts, old and new.
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