/ Dictionary / Index A archdiocese: Meaning and Definition of Find definitions for: arch•di•o•cese Pronunciation: (ärch"dī'u-sēs", -sis), [key] — n. the diocese of an archbishop. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: archdiocese (Thesaurus) archdeaconry archducal Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language