a. [ See Quadrate. ] (Math.) That may be sqyared, or reduced to an equivalent square; -- said of a surface when the area limited by a curve can be exactly found, and expressed in a finite number of algebraic terms. [ 1913 Webster ]

n. [ F., fr. L. quadrangulum; quattuor four + angulus an angle. See Four, and Angle a corner. ] [ 1913 Webster ]

1. (Geom.) A plane figure having four angles, and consequently four sides; any figure having four angles. [ 1913 Webster ]

2. A square or quadrangular space or inclosure, such a space or court surrounded by buildings, esp. such a court in a college or public school in England. [ 1913 Webster ]