(mathematics) An n-by-n arrangement of n different integers such that each row, each column and each of the two diagonals contains each of the integers once and once only.

(idiomatic) To finish, complete, tidy or put in order. / (nautical) To square the ship's yards to make her run before the wind, with the wind blowing straight from the stern.

(games) A palindromic square word arrangement, usually in the form of a magic amulet.

A large plaza in Dongcheng district, Beijing, China. / A protest event held in the square on June 4, 1989.

(finance) A type of CDO (collateralized debt obligation) that invests in other CDOs.

(uncountable) Square dancing. / (countable) A particular instance of square dancing.

To take part in square dancing; to dance this type of dancing.

(mathematics) The number which, when squared, yields another number. / (mathematics) The positive number which, when squared, yields another number; the principal square root.

A unit of area (abbreviation sq yd or sq. yd.) equal to the area of a square the sides of which are one yard long (i.e. 3 feet by 3 feet or 9 square feet).

A unit of area (abbreviation sq mi or sq. mi. or mi²) equal to the area of a square the sides of which are each one mile long.