Meaning of REDUCTION in English

n. 1 the act or an instance of reducing; the process of being reduced. 2 an amount by which prices etc. are reduced. 3 a reduced copy of a picture etc. 4 an arrangement of an orchestral score for piano etc. reductive adj.

[ ME f. OF reduction or L reductio (as REDUCE) ]

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.