n (countable) A quantity of something that is part of the whole amount or number.
n (uncountable) Harmonious relation of parts to each other or to the whole.
n (countable) Proper or equal share.
n The relation of one part to another or to the whole with respect to magnitude, quantity, or degree.
n (mathematics, countable) A statement of equality between two ratios.
n (mathematics, archaic) The "rule of three", in which three terms are given to find a fourth.
n (countable, chiefly in the plural) Size.
v (transitive) To divide into proper shares; to apportion.
v (transitive) To form symmetrically.
v (transitive, art) To set or render in proportion.
v (transitive, archaic) To correspond to.