Hĕx'a-gŏn, n.

n. [Fr. hexagone, Lat. hexagonum; Gr. ἑξάγωνος, ‘six-cornered, from ἕξ, six, and γωνία, angle.] (Geom.) A plane figure of six sides and six angles.

Regular hexagon, a hexagon in which the angles are all equal, and likewise the sides all equal.