fraction Definition

fraction
noun

1. math.
An expression that indicates one or more equal parts of a whole, usually represented by a pair of numbers separated by a horizontal or diagonal line, where the upper number (the numerator) represents the number of parts selected and the lower number (the denominator) the total number of parts. Compare integer.
2. A portion; a small part of something.

Thesaurus: section, portion, part, division.
3. Christianity.
The breaking of the bread in the Eucharist.
4. chem.
A group of chemical compounds whose boiling points fall within a very narrow range, the components of which can be separated by fractional distillation.

Etymology: 14c: from Latin fractio breaking.