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English definition of “square”

square

adjective [-er/-est only] (SHAPE)   /skwer, skwær/
having four sides of equal length and four angles of 90°: They set up the square card tables for the bridge players. (abbreviation sq) A square unit of measurement is an area that is a particular distance wide and the same distance long: The box was three feet square. The correct figure is 900 sq miles.
(Definition of square adjective (SHAPE) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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