noun

• 1A plane figure with eight straight sides and eight angles.

  ‘You may know about a pentagon, a hexagon, or an octagon.’

  More example sentences

  • ‘You'll find that the interior angle of a regular octagon is 135 degrees.’
  • ‘They considered a square, a rectangle, even an octagon.’
  • ‘Each vertex triangle of the octagon is a vertex triangle of one such parallelogram.’
  • ‘If you think of an octagon as a square with its corners cut off, you'll realize how simple the shape truly is.’
  • ‘The octagon, suggests Perrin, was chosen for its resonance with the baptistries of the ancient and gothic worlds.’
  • ‘The octagon is the symbol of the meeting between heaven and earth because it is a compromise half way between a square and a circle.’
  • ‘When the four flat pages are folded out, they form an octagon.’
  • ‘We can go ahead and bend the octagon into three dimensions to get an idea of the topology generated by this tiling of the hyperbolic plane.’
  • ‘The place was shaped like an octagon, the second floor merely a balcony over the first, large fiberglass pillars supporting the platform.’
  • ‘The octagon represents one of the three sacred treasures of the Japanese imperial court: the sacred mirror.’
  • ‘A bout in the controversial sport takes place in an octagon shaped ring surrounded by wire mesh.’
  • ‘It was an odd octagon shape with large windows along the five outer walls.’
  • ‘It was a building taller than another in the city, in the shape of an octagon, but with circular shafts on each corner.’

  1. 1.1An object or building with a plan or cross section of this shape.
     ‘The house is formed of four octagons and no rectangular shapes or flat walls.’
     More example sentences

     • ‘The octagon is formed by a kind of train-track motif that jogs around a flower-blossom design.’
     • ‘Only a handful of gunsmiths have the ability to cut a tapered octagon barrel.’
     • ‘The heavy, stiff octagon barrel has a lot to do with this.’
     • ‘At any given fight, Leon's on one side of the octagon, I'm on the other.’
     • ‘The medallion itself was an octagon with curved sides and a yin-yang symbol, but now it was glowing along with the animal orbs.’
     • ‘This can be repeated to transform the octagon into a sixteen-sided figure on which the base of the dome may rest.’
     • ‘Discarded pieces from games may turn up stars, triangles or octagons.’
     • ‘A group of paper octagons followed the cloth pieces.’
     • ‘The main center block and the octagons at each end were built between 1860 and 1862.’
     • ‘He glared savagely at the ball in his hands; the black octagons were marred by the white powder of the ceiling.’
     • ‘The octagon is then placed on the white stand, where it is fixed into a star formation with the help of a metal bracket.’
     • ‘The burger's much smaller now, chiselled into a rough octagon.’
     • ‘Even more astonishing is his chapel, designed by Einhard on the basis of the mystic octagon.’
     • ‘Goodbye to the quaint packaging, goodbye to the fruit-and-nut delight, and so-long to the vanilla octagon.’
     • ‘That octagon in the background is one of the Cuban clinics.’
     • ‘The Chicago studio had an octagon room with sketches on the walls.’
     • ‘The magazine tube holds 10 rounds and the tapered octagon barrel is 20 inches long.’
     • ‘The octagon coffee table in the middle of the room was covered with a round doily and a vase of fresh flowers in the center.’
     • ‘To make a tapered octagon barrel involves an expensive custom made fixture.’