Definition of polygon in US English:



  • A plane figure with at least three straight sides and angles, and typically five or more.

    • ‘She reasoned that there are three different ways in which a convex polygon encloses all five points.’
    • ‘For purposes of clarification: a hexagon is a polygon with six sides and six angles.’
    • ‘He proposed successively doubling the number of sides of a regular polygon inscribed in a circle so that the difference in areas would eventually become exhausted.’
    • ‘The polygon circumscribing the circle of radius s is shown in Figure 10b.’
    • ‘This he obtained by circumscribing and inscribing a circle with regular polygons having 96 sides.’


Late 16th century: via late Latin from Greek polugōnon, neuter (used as a noun) of polugōnos ‘many-angled’.