Definition of pelagian

• a. - Of or pertaining to the sea; marine; pelagic; as, pelagian shells.
• n. - A follower of Pelagius, a British monk, born in the later part of the 4th century, who denied the doctrines of hereditary sin, of the connection between sin and death, and of conversion through grace.
• a. - Of or pertaining to Pelagius, or to his doctrines.