adjective
- shaped like a rectangle.
- having the base or section in the form of a rectangle: a rectangular pyramid.
- having one or more right angles.
- forming a right angle.
adjective
- shaped like a rectangle
- having or relating to right angles
- mutually perpendicularrectangular coordinates
- having a base or section shaped like a rectangle
1620s, from Middle French rectangulaire (16c.) or formed in English from Latin stem of rectangle + -ar. Related: Rectangularity.