/ Dictionary / Index P Pelagius: Meaning and Definition of Find definitions for: Pe•la•gi•us Pronunciation: (pu-lā'jē-us), [key] — n. 360?–420?, English monk and theologian who lived in Rome: teachings opposed by St. Augustine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pelagius (Thesaurus) pelagic division Pelagius I 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