English▸ noun Geometry a four-sided plane figure, especially a square or rectangle.
▪ a square or rectangular space or courtyard enclosed by buildings.
▪ US the area shown on a standard topographic map sheet of the US Geological Survey.
– ORIGIN late Middle English : from Old French, or from late Latin quadrangulum ‘square’, neuter of quadrangulus, from Latin quadri- ‘four’ + angulus ‘corner, angle’.