adjective
Having four equal sides, the opposite sides parallel, and four right angles; square.
Produced by multiplying a number by itself; square.
(archaic) Square; even; balanced; equal; exact.
(archaic) Squared; suited; correspondent.
noun
(geometry) A plane surface with four equal sides and four right angles; a square; hence, figuratively, anything having the outline of a square.
(astrology) An aspect of the heavenly bodies in which they are distant from each other 90°, or the quarter of a circle; quartile.
(anatomy) The quadrate bone.
verb
(archaic, transitive) To adjust (a gun) on its carriage.
(archaic, transitive) To train (a gun) for horizontal firing.
(archaic, ambitransitive) To square.
(archaic, transitive) To square; to agree; to suit; to correspond (with).