/ Dictionary / Index M maturation division: Meaning and Definition of Find definitions for: matura'tion divi"sion Pronunciation: [key] a stage in meiosis during which the chromosomal number of the reproductive cell is reduced to one chromosome from each original chromosome pair. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. maturation mature Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language