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Definition of "octagon" []

  • A polygon with eight sides and eight angles. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "octagon" in a sentence
  • "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."