/ Dictionary / Index R reduction: Meaning and Definition of Find definitions for: re•duc•tion Pronunciation: (ri-duk'shun), [key] — n. the act of reducing or the state of being reduced. the amount by which something is reduced or diminished. a form produced by reducing; a copy on a smaller scale. meiosis, esp. the first meiotic cell division in which the chromosome number is reduced by half. the process or result of reducing. the process of making a print of a narrower gauge from a print of a wider gauge: the reduction of 35-mm films to 16-mm for the school market. a village or settlement of Indians in South America established and governed by Spanish Jesuit missionaries. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: reduction (Thesaurus) reductio ad absurdum reduction division Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language