/ Dictionary / Index I itinerarium: Meaning and Definition of Find definitions for: i•tin•er•ar•i•um Pronunciation: (ī-tin"u-râr'ē-um, i-tin"-), [key] — pl. -er•ar•i•a -er•ar•i•ums. a prayer in the breviary, used by a priest about to begin a journey. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. itinerant itinerary Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language