Pelagian /pəˈleɪd͡ʒiən/adjective 1noun 1forms 3 adjective1 •Of or pertaining to Pelagius (circa 354–420/440), an ascetic who denied the need for divine aid in performing good works. noun1 •A supporter of the doctrines of Pelagius. formsPelagians · more Pelagian · most Pelagian