rectangle Meaning, Definition & Usage

  1. noun a parallelogram with four right angles

WordNet

Rec"tan`gle noun
Etymology
F., fr. L. rectus right + angulus angle. See Right, and Angle.
Definitions
  1. (Geom.) A four-sided figure having only right angles; a right-angled parallelogram. ✍ As the area of a rectangle is expressed by the product of its two dimensions, the term rectangle is sometimes used for product; as, the rectangle of a and b, that is, ab.
Rec"tan`gle adjective
Definitions
  1. Rectangular. R.

Webster 1913