Definition of quadrates:
(adj) :
Having four equal sides, the opposite sides parallel, and four right angles; square.
(adj) :
Produced by multiplying a number by itself; square.
(n) :
(geometry) A plane surface with four equal sides and four right angles; a square; hence, figuratively, anything having the outline of a square.
(n) :
(astrology) An aspect of the heavenly bodies in which they are distant from each other 90°, or the quarter of a circle; quartile.
(n) :
(anatomy) The quadrate bone.
(adj) :
(archaic) Square; even; balanced; equal; exact.