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From The Collaborative International Dictionary of English v.0.44 [gcide]:
Reduction \Re*duc"tion\ (r[-e]*d[u^]k"sh[u^]n), noun [F. r['e]duction, L. reductio. See {Reduce}.]
1. 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. (Arith. & Alg.) The act or process of reducing. See {Reduce}, verb (used with an object), 6. and {To reduce an equation}, {To reduce an expression}, under {Reduce}, verb (used with an object)
3. (Astron.) (a) The correction of observations for known errors of instruments, etc. (b) The preparation of the facts and measurements of observations in order to deduce a general result.
4. The process of making a copy of something, as a figure, design, or draught, on a smaller scale, preserving the proper proportions. --Fairholt.
5. (Logic) The bringing of a syllogism in one of the so-called imperfect modes into a mode in the first figure.
6. (Chem. & Metal.) The act, process, or result of reducing[7]; as, the reduction of iron from its ores; the reduction of an aldehyde into an alcohol.
7. (Med.) The operation of restoring a dislocated or fractured part to its former place.
{Reduction ascending} (Arith.), the operation of changing numbers of a lower into others of a higher denomination, as cents to dollars.
{Reduction descending} (Arith.), the operation of changing numbers of a higher into others of a lower denomination, as dollars to cents.
Syn: Diminution; decrease; abatement; curtailment; subjugation; conquest; subjection.
From WordNet (r) 2.0 [wn]:
reduction
noun
1: the act of decreasing or reducing something [syn: {decrease}, {diminution}, {step-down}] [ant: {increase}]
2: 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 [syn: {reducing}]
3: the act of reducing complexity [syn: {simplification}]
From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:
290 Moby Thesaurus words for "reduction": abasement, abatement, abbreviation, about-face, abridgment, abstract, acetification, acidification, acidulation, addition, agio, alchemy, alkalization, allayment, alleviation, allowance, analgesia, anesthesia, anesthetizing, apocope, appeasement, approximation, assimilation, assuagement, assumption, astriction, astringency, attenuation, attrition, bank discount, becoming, blunting, bottleneck, break, breakage, breaking, bump, bust, calming, carbonation, cash discount, casting down, catalysis, cervix, chain discount, change, change-over, charge-off, cheapening, chemicalization, circumscription, coarctation, compactedness, compaction, compression, compressure, concavity, concentration, concession, condensation, conquering, consolidation, conspectus, constriction, constringency, contraction, contracture, conversion, crushing, curtailment, cut, cutting, dampening, damping, de-escalation, deadening, debasement, debilitation, decline, decrease, decrement, decrescence, deduction, deflation, degradation, degrading, demotion, demulsion, depletion, depluming, depreciation, depression, derogation, descent, detraction, detrusion, devaluation, devitalization, differentiation, dilution, diminishment, diminuendo, diminution, dip, discount, disgrading, disparagement, displuming, dive, division, domestication, downgrading, drawback, ducking, dulcification, dulling, dying, dying off, ease, easement, easing, effemination, electrolysis, elision, ellipsis, enervation, enfeeblement, epitome, equation, evisceration, evolution, exhaustion, extenuation, extraction, extrapolation, fade-out, falling-off, fatigue, ferment, fermentation, flip-flop, foreshortening, growth, hauling down, hollowness, hourglass, hourglass figure, humbling, humiliation, hushing, hydrogenation, impairment, inanition, integration, interpolation, inversion, involution, isomerism, isthmus, kickback, knitting, languishment, lapse, leniency, lessening, letdown, letup, lightening, loosening, lowering, lulling, markdown, metamerism, metamerization, miniaturization, mitigation, modulation, mollification, multiplication, narrow place, narrowing, naturalization, neck, nitration, nose dive, notation, numbing, oxidation, oxidization, pacification, palliation, passage, penalty, penalty clause, percentage, phosphatization, plummet, plummeting, plunge, polymerism, polymerization, position isomerism, practice, precis, premium, price cut, price fall, price reduction, price-cut, progress, proportion, puckering, pursing, quelling, quietening, quieting, re-formation, rebate, rebatement, recap, recapitulation, reconversion, refund, relaxation, relief, remedy, remission, resolution, retraction, retrenchment, reversal, rollback, sag, sagging, salvage, salving, saturization, scaling down, setoff, shift, shortening, shrinkage, simplicity, sinking, slackening, slash, slump, softening, solidification, soothing, stranglement, strangulation, striction, stricture, stripping of rank, subdual, subduement, submergence, subtraction, summary, summation, suppression, switch, switch-over, syncope, synopsis, systole, taming, tare, telescoping, tempering, thinning, thrusting under, time discount, trade discount, tranquilization, transformation, transit, transition, treading down, tret, truncation, turning into, underselling, volte-face, wasp waist, weakening, working, wrinkling, write-off
From The Free On-line Dictionary of Computing (27 SEP 03) [foldoc]:
reduction (Or "contraction") The process of transforming an expression according to certain reduction rules. The most important forms are {beta reduction} (application of a {lambda abstraction} to one or more argument expressions) and {delta reduction} (application of a mathematical function to the required number of arguments). An {evaluation strategy} (or {reduction strategy}), determines which part of an expression (which redex) to reduce first. There are many such strategies. See {graph reduction}, {string reduction}, {normal order reduction}, {applicative order reduction}, {parallel reduction}, {alpha conversion}, {beta conversion}, {delta conversion}, {eta conversion}. (1995-02-21)
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