Definition of fractions:
(n) :
A part of a whole, especially a comparatively small part.
(n) :
(arithmetic) A ratio of two numbers (numerator and denominator), usually written one above the other and separated by a horizontal bar called the vinculum or, alternatively, in sequence on the same line and separated by a solidus (diagonal bar).
(n) :
A small amount.
(n) :
(chemistry) A component of a mixture, separated by fractionation.
(v) :
(transitive) To divide or break into fractions.
(v) :
(transitive) To fractionate.