/ Dictionary / Index I interrex: Meaning and Definition of Find definitions for: in•ter•rex Pronunciation: (in'tur-reks"), [key] — pl. in•ter•re•ges a person holding supreme authority in a state during an interregnum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. interreligious interrobang 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