- The definition of a reduction is a decrease or a lessening in amount, or the amount by which something decreases or goes down.
- When the income tax rate is cut, this is an example of a time when you get a reduction in taxes.
- When a price goes down by 10 percent, this is an example of a 10 percent reduction.
- a reducing or being reduced
- anything made or brought about by reducing, as a smaller copy, lowered price, sauce of concentrated liquid, etc.
- the amount by which anything is reduced
Origin of reductionLate Middle English reduccion ; from Middle French reduction ; from Classical Latin reductio ; from reductus, past participle of reducere
- The act or process of reducing.
- The result of reducing: a reduction in absenteeism.
- The amount by which something is lessened or diminished: a reduction of 12 percent in violent crime.
- A sauce that has been thickened or concentrated by boiling.
- Biology The first meiotic division, in which the chromosome number is reduced. Also called reduction division.
- Chemistry a. A decrease in positive valence or an increase in negative valence by the gaining of electrons.b. A reaction in which hydrogen is combined with a compound.c. A reaction in which oxygen is removed from a compound.
- Mathematics a. The canceling of common factors in the numerator and denominator of a fraction.b. The converting of a fraction to its decimal equivalent.c. The converting of an expression or equation to its simplest form.
Origin of reductionMiddle English reduccion, restoration, from Old French reduction, from Latin reductiō, reductiōn-, from reductus, past participle of redūcere, to bring back; see reduce.
- The act, process, or result of reducing.
- The amount or rate by which something is reduced, e.g. in price.
- A 5% reduction in robberies
- (chemistry) A reaction in which electrons are gained and valence is reduced; often by the removal of oxygen or the addition of hydrogen.
- (cooking) The process of rapidly boiling a sauce to concentrate it.
- (mathematics) The rewriting of an expression into a simpler form.
- (computability theory) a transformation of one problem into another problem, such as mapping reduction or polynomial reduction.
- (music) An arrangement for a far smaller number of parties, e.g. a keyboard solo based on a full opera.
- (philosophy, phenomenology) A philosophical procedure intended to reveal the objects of consciousness as pure phenomena. (See phenomenological reduction.)
- (medicine) A medical procedure to restore a fracture or dislocation to the correct alignment.
From Middle English reduccion, from Old French reducion, from Latin reductio.