polygon

noun

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

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