(1):
(n.) The act of breaking, or state of being broken, especially by violence.
(2):
(n.) A portion; a fragment.
(3):
(n.) One or more aliquot parts of a unit or whole number; an expression for a definite portion of a unit or magnitude.
(4):
(v. t.) To separate by means of, or to subject to, fractional distillation or crystallization; to fractionate; - frequently used with out; as, to fraction out a certain grade of oil from pretroleum.