Of, pertaining to, or relating to mathematics; having to do with pure quantity; quantitative: as, mathematical knowledge; mathematical instruments; a mathematical theory.According to the principles of mathematics; theoretically precise; absolutely accurate; strict; rigid; demonstrable: as, mathematical exactness; mathematical certainty.Geometrical, as opposed to arithmetical and algebraical: an incorrect use, formerly current.Astrological; magical.Produced by mathematics, as pure figures and number.Mathematics.