# quadrilateral

[kwod-ruh-lat-er-uh l]

### adjective

having four sides.

### noun

a plane figure having four sides and four angles.

something of this form.

Geometry.

- 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. 2019

## Examples from the Web for quadrilateral

### Historical Examples of quadrilateral

They form the quadrilateral wherein Daudet's fame is secure.

The Nabob, Volume 1 (of 2)Alphonse Daudet

A quadrilateral figure that has only two of its four sides parallel.

The Sailor's Word-BookWilliam Henry Smyth

Thus, in the circle and the quadrilateral (the parts are not circles or quadrilaterals).

Plotinos: Complete Works, v. 2Plotinos (Plotinus)

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 ArtG. G. (Gustavus George) Zerffi

## quadrilateral

### adjective

### noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Online Etymology Dictionary, © 2010 Douglas Harper

## quadrilateral

[kwŏd′rə-lăt′ər-əl]

The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.