fraction-n; 3 Senses

Sense Number 1: the quotient of two numbers, a non-whole numeric value

Commentary: FRACTION[+quantity][+number][+rational][-whole]

The children are learning fractions this week in their math class.
Adding the fractions 1/4 and 1/3 results in 7/12.
You can also write 25/1000 as the decimal fraction .025.

WordNet 3.0 Sense Numbers: 3

Sense Number 2: a small, indefinite portion of something

Commentary: FRACTION[+quantity][+portion][+small][+indefinite]

They are not one fraction closer to a settlement than they were before.
This flooring material costs a fraction of what that Italian marble would cost.
It was just a fraction of an inch too short. (the specific fraction is not identified, so not sense 1)

WordNet 3.0 Sense Numbers: 2

Sense Number 3: a component of a chemical mixture separated out by fractionation

Commentary: FRACTION[+entity][+substance][+mixture][+chemical][+component][+separated]

Alcohol is one of the fractions in this blue liquid.
This process will separate the material into its four chemical fractions.

WordNet 3.0 Sense Numbers: 1