noun
definition
A polygon with eight sides and eight angles.
definition
Often in the form Octagon: the arena for mixed martial arts.
Examples of octagons in a Sentence
The truncated cube is formed in the same manner as the cuboctahedron, but the truncation is only carried far enough to leave the original faces octagons.
The standard of course is the long rectangular aquarium, but aquariums now also come in such shapes as octagons, cylinders and cubes.
This type of jewelry box comes in various shapes, including octagons, circles, squares, and rectangles.
Then move to pentagons (5 sides), hexagons (6 sides), and octagons (8 sides), etc. if it appears that children have mastered the first set of shapes.