Source : Webster's Revised Unabridged Dictionary (1913)

Quadrangle \Quad"ran`gle\, n. [F., fr. L. quadrangulum; quattuor
   four + angulus an angle. See {Four}, and {Angle} a corner.]
   1. (Geom.) A plane figure having four angles, and
      consequently four sides; any figure having four angles.

   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.

Source : WordNet®

quadrangle
     n 1: a four-sided polygon [syn: {quadrilateral}, {tetragon}]
     2: a rectangular area surrounded on all sides by buildings
        [syn: {quad}]