— quadrilaterally , adv. — quadrilateralness , n.
/kwod'reuh lat"euhr euhl/ , adj.
1. having four sides.
n.
2. a plane figure having four sides and four angles.
3. something of this form.
4. Geom.
a. a figure formed by four straight lines that have six points of intersection.
b. a polygon with four sides.
5. the space enclosed between and defended by four fortresses.
[ 1640-50; quadrilater ( us ) four-sided + -AL 1 . See QUADRI-, LATERAL ]