/ Dictionary / Index P Pelagius I: Meaning and Definition of Find definitions for: Pelagius I Pronunciation: [key] dieda.d.561, pope 556–561. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Pelagius Pelagius II Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language