A separation or division into two; a distinction that results in such a division.
The division of a genus into two species; a division into two subordinate parts.
A phase of the moon when it appears half lit and half dark, as at the quadratures.
Such a division involving apparently incompatible or opposite principles; a duality.
The division of a class into two disjoint subclasses that are together comprehensive, as the division of man into white and not white.
Division and subdivision; bifurcation, as of a stem of a plant or a vein of the body into two parts as it proceeds from its origin; often successive.
The integer part of the result of such division.
The number resulting from the division of one number by another.
By analogy, the result of any process that is the inverse of multiplication as defined for any mathematical entities other than numbers.