From The Collaborative International Dictionary of English v.0.48:

Quadrangle \Quad"ran`gle\, 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]
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