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n. (Geom.) A plane figure having four angles, and consequently four sides; any figure having four angles. A square or quadrangular space or enclosure, such a space or court surrounded by buildings, esp. such a court in a college or public school in England. (Real Estate) In the Government Survey method of describing real property, a square area of land 24 miles square (24 miles on each side or 576 square miles), containing 16 Townships (six miles square) or 576 Sections (one mile square).