What does "polygon" mean?

A plane figure bounded by edges that are all straight lines.

Polygon

Common synonyms include: closed chain, closed polyline, enclosure, equal angled polygon, equal sided polygon, figure.

/ˈpɑliˌɡɑn/ noun

noun ·Rare ·Advanced level

Noun

1
A plane figure bounded by edges that are all straight lines.
2
a closed plane figure bounded by straight sides wordnet
3
The boundary of such a figure.
4
A figure comprising vertices and (not necessarily straight) edges, alternatingly. broadly
5
Such a figure and its interior, taken as a whole.

"Each face of a polyhedron is a polygon."

From Ancient Greek πολύγωνον (polúgōnon), from πολύς (polús, “many”) + γωνία (gōnía, “angle”), equivalent to poly- + -gon.