The Collaborative International Dictionary
Pelagian \Pe*la"gi*an\, n. [L. Pelagianus: cf. F. p['e]lagien.] (Eccl. Hist.) 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.
Pelagian \Pe*la"gi*an\, a. [L. pelagius, Gr. ?, fr. ? the sea: cf. F. p['e]lagien.] Of or pertaining to the sea; marine; pelagic; as, pelagian shells.
Pelagian \Pe*la"gi*an\, a. [Cf. F. p['e]lagien.] Of or pertaining to Pelagius, or to his doctrines.
Douglas Harper's Etymology Dictionary
1530s (n.); 1570s (adj.), from Medieval Latin Pelagianus, from Pelagius, Latinized form of the name of 4c. British monk who denied the doctrine of original sin. Combated by Augustine, condemned by Pope Zosimus in 418 C.E. His name in Welsh was said to have been Morgan, literally "sea-dweller" (hence his Church name, from Greek pelagos "sea;" see pelagic). Related: Pelagianism.
Wiktionary
a. (context archaic English) pelagic; of or pertaining to the sea.
Usage examples of "pelagian".
British clergy incessantly labored to eradicate the Pelagian heresy, which they abhorred, as the peculiar disgrace of their native country.
You have in addition exposed yourself as an Arian, a Pelagian, a Catharist, and a Gnostic.
Augustine had spent more than thirty years battling the Donatists, he was dismayed to confront Christians he called the Pelagians who, despite many differences, as we shall see in Chapter 6, shared with the Donatists both a sectarian view of the church and an insistence on free will.
That is why it deals blows impartially right and left, at the pessimism of the Manichean or the optimism of the Pelagian.
Beside, if they were anything like the Ceile De, whom Marcus had likewise condemned out of hand, and who I knew to be unjustly accused, then these Pelagians had my entire sympathy.
After the Imperials have taken control of the planet, the ship, now in a standard orbit, is rechristened Pelagia's Moon and used as a space station, though the nobility of Pelagon still desire to one day fix the ship / station and make it the flagship of a Pelagian battle fleet once again.