# Polygon definition

pŏlē-gŏn
Frequency:
A closed plane figure bounded by three or more line segments.
noun
A closed plane figure consisting of straight lines.
noun
The definition of a polygon is a geometric figure with straight sides and angles.

An example of a polygon is a octagon, a figure with eight sides.

An example of a polygon is a triangle, a figure with three sides.

noun
A closed plane figure having three or more sides. Triangles, rectangles, and octagons are all examples of polygons. &diamf3; A regular polygon is a polygon all of whose sides are the same length and all of whose interior angles are the same measure.
(geometry) A plane figure bounded by straight edges.
noun
(geometry) The boundary of such a figure.
noun
(geometry, more generally) A figure comprising vertices and (not necessarily straight) edges, alternatingly.
noun
(geometry) Such a figure and its interior, taken as a whole.
noun

Singular:
polygon
Plural:
polygons

## Origin of polygon

• Late Latin polygōnum from Greek polugōnon from neuter of Greek polugōnos polygonal polu- poly- -gōnos angled –gon

### From American Heritage Dictionary of the English Language, 5th Edition

• Ancient Greek πολύγωνον (polygōnon), from πολύς (polus, “many") and γωνία (gōnia, “angle").