/ Dictionary / Index D Dionysius of Alexandria, Saint: Meaning and Definition of Find definitions for: Diony'sius of Alexan'dria Saint Pronunciation: [key] — (“the Great”), a.d. c190–265, patriarch of Alexandria 247?–265?. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Dionysius Exiguus Dionysius of Halicarnassus Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language