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English definition of “polygon”

polygon

noun [C]     /ˈpɒl.ɪ.ɡɒn/ US  /ˈpɑː.lɪ.ɡɑːn/ specialized
a flat shape with three or more straight sides: Triangles and squares are polygons.Geometrical shapesSpherical, circular and annular objects
(Definition of polygon noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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