/ Dictionary / Index A apostolic vicar: Meaning and Definition of Find definitions for: ap'ostol'ic vic'ar. Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. apostolic succession Apostolos Related Content Daily Word Quiz: tactful Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language