reduction

noun

1. 1

   The act, process, or result of reducing.

2. 2

   The amount or rate by which something is reduced, e.g. in price.

   “A 5% reduction in robberies”

3. 3

   A reaction in which electrons are gained and valence is reduced; often by the removal of oxygen or the addition of hydrogen.

4. 4

   The process of rapidly boiling a sauce to concentrate it.

5. 5

   The rewriting of an expression into a simpler form.

6. 6

   (computability theory) a transformation of one problem into another problem, such as mapping reduction or polynomial reduction.

7. 7

   An arrangement for a far smaller number of parties, e.g. a keyboard solo based on a full opera.

8. 8

   (phenomenology) A philosophical procedure intended to reveal the objects of consciousness as pure phenomena. (See phenomenological reduction.)

9. 9

   A medical procedure to restore a fracture or dislocation to the correct alignment.