/ Dictionary / Index I ipse dixit*: Meaning and Definition of Find definitions for: ip•se dix•it Pronunciation: (ip'se dik'sit Eng. ip'sē dik'sit), [key] — Latin. Latin. he himself said it. an assertion without proof. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ipsambul ipsilateral Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language