- having four sides.
- a plane figure having four sides and four angles.
- something of this form.
- a figure formed by four straight lines that have six points of intersection.
- a polygon with four sides.
- the space enclosed between and defended by four fortresses.
Origin of quadrilateral
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for quadrilateral
They form the quadrilateral wherein Daudet's fame is secure.The Nabob, Volume 1 (of 2)
A quadrilateral figure that has only two of its four sides parallel.The Sailor's Word-Book
William Henry Smyth
Thus, in the circle and the quadrilateral (the parts are not circles or quadrilaterals).Plotinos: Complete Works, v. 2
The walled part of the town is a quadrilateral with faces of about 1200 yds.
The quadrilateral Isis-headed capital, as at Denderah, was often used.A Manual of the Historical Development of Art
G. G. (Gustavus George) Zerffi
- having or formed by four sides
- Also called: tetragon a polygon having four sides. A complete quadrilateral consists of four lines and their six points of intersection
Word Origin and History for quadrilateral
Online Etymology Dictionary, © 2010 Douglas Harper
- A polygon that has four sides, such as a rectangle or rhombus.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.