/ Dictionary / Index D dedifferentiate: Meaning and Definition of Find definitions for: de•dif•fer•en•ti•ate Pronunciation: (dē"dif-u-ren'shē-āt"), [key] — -at•ed, -at•ing. to undergo dedifferentiation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dedifferentiate (Thesaurus) dedicatory dedifferentiation Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language