reduction

1. The act, process, or result of reducing. (countable, uncountable)
2. The amount or rate by which something is reduced, e.g. in price. (countable, uncountable) · A 5% reduction in robberies
3. A reaction in which electrons are gained and valence is reduced; often by the removal of oxygen or the addition of hydrogen. (countable, uncountable)
4. The process of rapidly boiling a sauce to concentrate it. (countable, uncountable)
5. The rewriting of an expression into a simpler form. (countable, uncountable)
6. A transformation of one problem into another problem, such as mapping reduction or polynomial-time reduction. (countable, uncountable)
7. An arrangement for a far smaller number of parties, e.g. a keyboard solo based on a full opera. (countable, uncountable)
8. A philosophical procedure intended to reveal the objects of consciousness as pure phenomena. (See phenomenological reduction.) (countable, uncountable)

Plural reductions