/ Dictionary / Index D dioc.: Meaning and Definition of Find definitions for: dioc. Pronunciation: [key] diocesan. diocese. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Dinwiddie diocesan Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language