What does reduction mean?

Definitions for reduction
rɪˈdʌk ʃənre·duc·tion

This dictionary definitions page includes all the possible meanings, example usage and translations of the word reduction.

Princeton's WordNet

  1. decrease, diminution, reduction, step-downnoun

    the act of decreasing or reducing something

  2. reduction, reducingnoun

    any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent

  3. reduction, simplificationnoun

    the act of reducing complexity


  1. reductionnoun

    The act, process, or result of reducing.

  2. reductionnoun

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

    A 5% reduction in robberies

  3. reductionnoun

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

  4. reductionnoun

    The process of rapidly boiling a sauce to concentrate it.

  5. reductionnoun

    The rewriting of an expression into a simpler form.

  6. reductionnoun

    a transformation of one problem into another problem, such as mapping reduction or polynomial reduction.

  7. reductionnoun

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

  8. reductionnoun

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

  9. Etymology: From reduccion, from reducion, from reductio.

Samuel Johnson's Dictionary

  1. Reductionnoun

    Etymology: reduction, Fr. from reductus, Lat.

    Some will have these years to be but months; but we have no certain evidence that they used to account a month a year; and if we had, yet that reduction will not serve. Matthew Hale.


  1. reduction

    Reduction is a process or reaction in which a substance gains electrons, or the oxidation state of an element in it decreases. In a wider sense, it may refer to the process of making something smaller or less in amount, degree, or size, the simplification of a subject or problem, or the conversion of a complex data set or mathematical algorithm to a simpler form.

Webster Dictionary

  1. Reductionnoun

    the act of reducing, or state of being reduced; conversion to a given state or condition; diminution; conquest; as, the reduction of a body to powder; the reduction of things to order; the reduction of the expenses of government; the reduction of a rebellious province

  2. Reductionnoun

    the act or process of reducing. See Reduce, v. t., 6. and To reduce an equation, To reduce an expression, under Reduce, v. t

  3. Reductionverb

    the correction of observations for known errors of instruments, etc

  4. Reductionverb

    the preparation of the facts and measurements of observations in order to deduce a general result

  5. Reductionverb

    the process of making a copy of something, as a figure, design, or draught, on a smaller scale, preserving the proper proportions

  6. Reductionverb

    the bringing of a syllogism in one of the so-called imperfect modes into a mode in the first figure

  7. Reductionverb

    the act, process, or result of reducing; as, the reduction of iron from its ores; the reduction of aldehyde from alcohol

  8. Reductionverb

    the operation of restoring a dislocated or fractured part to its former place


  1. Reduction

    In philosophy, reduction is the process by which one object, property, concept, theory, etc., is shown to be explicable in terms of another, lower level, entity. In particular, a concern of philosophy is as to the scope of physical theory, and whether, for example, all events are ultimately physical events, a discussion closely related to the topic of causal closure. In science, such reduction is generally desirable, because it explains why and how the thing which is being reduced exists, and because it promotes conceptual and theoretical economy. Reducing chemical properties to properties of atoms thus explains these properties and integrates them into a single explanatory framework, that of atomic structure. For example, we say that physical properties such as the boiling point of a substance are reducible to that substance’s molecular properties, because statistical mechanics explain why a liquid boils at a certain temperature using only the properties of its constituent atoms. Thus we might also describe reduction as a process analogous to absorption, by which one theory is wholly subsumed under another. Reductionism can be divided into three general areas – methodological, theoretical, and ontological – and reduction into two – theoretical and ontological.

Dictionary of Military and Associated Terms

  1. reduction

    The creation of lanes through a minefield or obstacle to allow passage of the attacking ground force.

Matched Categories

British National Corpus

  1. Spoken Corpus Frequency

    Rank popularity for the word 'reduction' in Spoken Corpus Frequency: #2191

  2. Written Corpus Frequency

    Rank popularity for the word 'reduction' in Written Corpus Frequency: #2038

  3. Nouns Frequency

    Rank popularity for the word 'reduction' in Nouns Frequency: #761

How to pronounce reduction?

How to say reduction in sign language?


  1. Chaldean Numerology

    The numerical value of reduction in Chaldean Numerology is: 1

  2. Pythagorean Numerology

    The numerical value of reduction in Pythagorean Numerology is: 1

Examples of reduction in a Sentence

  1. Assemblyman James Gallagher:

    This hits really close to home for me, i represent Paradise, a town that was decimated by a wildfire in 2018. We have kept saying that we need to put more investment into fuel reduction. These fuels have built up in our forests over the decades, mostly because we've got rid of any kind of forestry management in California. The governor keeps telling everybody that he's putting all kinds of money into wildfire prevention. And as it turns out, it's been a fraction of what he's been stating to the California public.

  2. Hope Cronin:

    Milestone B is currently projected for the fourth quarter of fiscal year 2020. This represents the completion of technology maturation and risk reduction activities and initiates the engineering and manufacturing development phase.

  3. Loren Weisman:

    My PEMF Experience with Bemer has helped me with the reduction of physical pain, an increased creative endurance and a renewed awareness and connection to the needs of my mind and body”

  4. Ben Woolsey:

    If rates continue to rise, we might see a reduction in the duration of the zero-percent periods from a year or longer to some shorter period.

  5. Micaela Pasini:

    Yemen needs support of the global community more than ever before, a reduction in aid will result in losses in the gains made so far in the protection and fulfillment of children’s rights.

Popularity rank by frequency of use


Translations for reduction

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"reduction." Definitions.net. STANDS4 LLC, 2024. Web. 27 May 2024. <https://www.definitions.net/definition/reduction>.

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    a small contrasting part of something
    A flapper
    B foumart
    C sundog
    D maculation

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