a closed plane figure bounded by three or more straight sides that meet in pairs in the same number of vertices, and do not intersect other than at these vertices. The sum of the interior angles is (n–2) × 180° for n sides; the sum of the exterior angles is 360°. A regular polygon has all its sides and angles equal. Specific polygons are named according to the number of sides, such as triangle, pentagon, etc
WordReference Random House Learner's Dictionary of American English © 2025
pol•y•gon /ˈpɑliˌgɑn/USA pronunciation
n. [countable]
WordReference Random House Unabridged Dictionary of American English © 2025- Mathematicsa figure, esp. a closed plane figure, having three or more sides.
pol•y•gon
(pol′ē gon′),USA pronunciation n.
po•lyg•o•nal
(pə lig′ə nl),USA pronunciation adj.
po•lyg′o•nal•ly, adv.
- Mathematicsa figure, esp. a closed plane figure, having three or more, usually straight, sides. See illus. under heptagon, hexagon, octagon, pentagon, quadrilateral, triangle.
- Greek polýgōnon, noun, nominal use of neuter of polýgōnos many-angled. See poly-, -gon
- Latin polygōnum
- 1560–70;
Collins Concise English Dictionary © HarperCollins Publishers::
'polygon' also found in these entries (note: many are not synonyms or translations):
apothem
- center
- circumcenter
- concave
- convex
- decagon
- diagonal
- dodecagon
- exterior angle
- figure
- fractal
- frequency polygon
- gon-
- hendecagon
- heptagon
- hexagon
- incenter
- inscribe
- interior angle
- isogon
- nonagon
- octagon
- opposite
- pentadecagon
- pentagon
- polygonaceous
- quadrilateral
- quindecagon
- reentering angle
- reentering polygon
- regular
- salient
- solid angle
- spherical polygon
- tetragon
- triangle
- undecagon