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See more synonyms for polygon on Thesaurus.com
  1. a figure, especially a closed plane figure, having three or more, usually straight, sides.
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Origin of polygon

1560–70; < Latin polygōnum < Greek polýgōnon, noun use of neuter of polýgōnos many-angled. See poly-, -gon
Related formspo·lyg·o·nal [puh-lig-uh-nl] /pəˈlɪg ə nl/, adjectivepo·lyg·o·nal·ly, adverbsub·po·lyg·o·nal, adjectivesub·po·lyg·o·nal·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words

shape, form, octagon, decagon, pentagon, triangle, quadrangle, hexagon, quadrilateral, parallelogram

Examples from the Web for polygon

Historical Examples

  • The trace of the walls was a polygon not unlike a capital L.

    A History of Art in Ancient Egypt, Vol. II (of 2)

    Georges Perrot

  • The Germans do not appear to have penetrated into the Polygon Wood at any point.

    Ypres 1914

    Otto Schwink

  • The view from the Polygon monument is desolation on all sides.

  • There was room there for making every sort of triangle or polygon.

    Insect Adventures

    J. Henri Fabre

  • For this polygon the other three problems mentioned are not solved.

British Dictionary definitions for polygon


  1. 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
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Derived Formspolygonal (pəˈlɪɡənəl), adjectivepolygonally, adverb

Word Origin

C16: via Latin from Greek polugōnon figure with many angles
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for polygon


1570s, from Latin polygonum, from Greek polygonon, noun use of neuter of adjective polygonos "many-angled," from polys "many" (see poly-) + -gonos "angled," from gonia "angle" (see knee (n.)). Related: Polygonal.

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Online Etymology Dictionary, © 2010 Douglas Harper

polygon in Science


  1. A closed plane figure having three or more sides. Triangles, rectangles, and octagons are all examples of polygons.♦ A regular polygon is a polygon all of whose sides are the same length and all of whose interior angles are the same measure.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

polygon in Culture


In geometry, a closed figure having three or more sides and lying on one plane.

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The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.