資料來源 : pyDict

縮小,減少,降低;簡化,簡約;還原,復原

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Reduction \Re*duc"tion\ (r?*d?k"sh?n), n. [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. & Alq.) 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. (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;
      as, the reduction of iron from its ores; the reduction of
      aldehyde from 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.

資料來源 : WordNet®

reduction
     n 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}]

資料來源 : Free On-Line Dictionary of Computing

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)