quadrilateral

[ kwod-ruh-lat-er-uh l ]
/ ˌkwɒd rəˈlæt ər əl /

adjective

having four sides.

noun

a plane figure having four sides and four angles.
something of this form.
Geometry.
  1. a figure formed by four straight lines that have six points of intersection.
  2. a polygon with four sides.
the space enclosed between and defended by four fortresses.

QUIZZES

Can You Ace This Quiz About “Compliment” vs. “Complement”?
Take this quiz to see if you really know the difference between “compliment” and “complement"!
Question 1 of 11
“Compliment” and “complement” had a shared meaning a long time ago, but today they are no longer interchangeable.

Origin of quadrilateral

1640–50; < Latin quadrilater(us) four-sided + -al1. See quadri-, lateral

OTHER WORDS FROM quadrilateral

quad·ri·lat·er·al·ly, adverbquad·ri·lat·er·al·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for quadrilateral

British Dictionary definitions for quadrilateral

quadrilateral
/ (ˌkwɒdrɪˈlætərəl) /

adjective

having or formed by four sides

noun

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

Scientific definitions for quadrilateral

quadrilateral
[ kwŏd′rə-lătər-əl ]

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.