/ Dictionary / Index D diffeomorphism: Meaning and Definition of Find definitions for: dif•fe•o•mor•phism Pronunciation: (dif"ē-ō-môr'fiz-um), [key] — n. Math. a differentiable homeomorphism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diff. differ 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