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reduction

/ɹiˈdɑk.ʃən/
noun
  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"

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

Synonymsdecline, lessening, extract, reduction
Antonymselevation, expansion, increase, promotion, addition, supplement

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reduction — meaning, definition & examples | WordNote | WordNote