Pronunciation: (kwod"ru-lat'ur-ul), [key]
having four sides.
1. a plane figure having four sides and four angles.
2. something of this form.
a. a figure formed by four straight lines that have six points of intersection.
b. a polygon with four sides.
4. the space enclosed between and defended by four fortresses.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.