# quadrilateral

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

- having four sides.

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- 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.

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## Origin of quadrilateral

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## 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

- having or formed by four sides

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- Also called: tetragon a polygon having four sides. A complete quadrilateral consists of four lines and their six points of intersection

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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

## Word Origin and History for quadrilateral

Online Etymology Dictionary, © 2010 Douglas Harper

## quadrilateral

[kwŏd′rə-lăt′ər-əl]

- A polygon that has four sides, such as a rectangle or rhombus.

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