pentagon

Definitions

1. 1.A plane figure having five angles, and, consequently, five sides; any figure having five angles. Regular pentagon, a pentagon in which the angles are all equal, and the sides all equal.

Source: Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).

Related questions

• What does "pentagon" mean?

Reverse-dictionary questions

Definition-first questions whose answer is pentagon.

• What is a plane figure having five angles, and, consequently, five sides; any figure having five angles. Regular pentagon, a pentagon in which the angles are all equal, and the sides all equal called?