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reduction definition


This page has 10 definitions of reduction in English. Reduction is a noun. Examples of how to use reduction in a sentence are shown. Also define these 38 related words and terms: reducing, amount, rate, reduced, chemistry, reaction, electron, gain, valence, removal, oxygen, addition, hydrogen, cooking, rapidly, boiling, sauce, concentrate, mathematics, expression, transformation, music, philosophy, philosophical, procedure, consciousness, pure, phenomena, phenomenological reduction, medicine, medical, fracture, dislocation, alignment, taxis, paying, fraction, and decimal.

See also: réduction



From Middle English reduccion, a borrowing from Old French reducion, from Latin reductiō, reductiōnem.



reduction (countable and uncountable, plural reductions)

  1. The act, process, or result of reducing.
  2. The amount or rate by which something is reduced, e.g. in price.
    A 5% reduction in robberies
    • Reduced definition
      simple past tense and past participle of reduce
  3. (chemistry) A reaction in which electrons are gained and valence is reduced; often by the removal of oxygen or the addition of hydrogen.
    • Chemistry definition
      The branch of natural science that deals with the composition and constitution of substances and the changes that they undergo as a consequence of alterations in the constitution of their molecules. (1 of 3 chemistry definitions)
  4. (cooking) The process of rapidly boiling a sauce to concentrate it.
  5. (mathematics) The rewriting of an expression into a simpler form.
  6. (computability theory) a transformation of one problem into another problem, such as mapping reduction or polynomial reduction.
  7. (music) An arrangement for a far smaller number of parties, e.g. a keyboard solo based on a full opera.
  8. (philosophy, phenomenology) A philosophical procedure intended to reveal the objects of consciousness as pure phenomena. (See phenomenological reduction.)
    • Pure definition
      Free of flaws or imperfections; unsullied. (1 of 7 pure definitions)
  9. (medicine) A medical procedure to restore a fracture or dislocation to the correct alignment.
    Synonym: taxis
  10. (paying) A reduced price of something by a fraction or decimal.
    • Fraction definition
      A part of a whole, especially a comparatively small part. (1 of 6 fraction definitions)



Derived terms


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