a plane figure composed of four straight lines and their points of intersection.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use complete quadrilateral in a sentence
A figure formed by four lines in a plane is called a complete quadrilateral, or, shorter, a four-side.
A four-side is usually called a complete quadrilateral, and a four-point a complete quadrangle.
Harmonic properties of the complete quadrilateral and quadrangle.