Meaning of REDUCE in English
( n. )
To bring into a certain order, arrangement, classification, etc.; to bring under rules or within certain limits of descriptions and terms adapted to use in computation; as, to reduce animals or vegetables to a class or classes; to reduce a series of observations in astronomy; to reduce language to rules.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012