- a figure formed by four straight lines that have six points of intersection.
- a polygon with four sides.
OTHER WORDS FROM quadrilateralquad·ri·lat·er·al·ly, adverbquad·ri·lat·er·al·ness, noun
Words nearby quadrilateral
How to use quadrilateral in a sentence
But a quadrilateral would also be constituted by four lines arranged in some particular manner.Plotinos: Complete Works, v. 3|Plotinos (Plotinus)
A figure that is bounded by four straight lines is termed a quadrangle, quadrilateral or tetragon.Mechanical Drawing Self-Taught|Joshua Rose
Platt-Teutsch platooning, bayonet-charging,—on such terms no Russian or mortal Quadrilateral can stand it.History of Friedrich II. of Prussia, Vol. XVIII. (of XXI.)|Thomas Carlyle
This left in the hands of the Austrians still an important part of northern Italy known as the Quadrilateral.
The first stage or platform is at the height of 189 feet, and forms a quadrilateral 213 feet square, fitted up as a restaurant.The New Gresham Encyclopedia|Various