- a follower of Pelagius, who denied original sin and believed in freedom of the will.
- of or relating to Pelagius or Pelagianism.
- of or inhabiting the open sea
- of or relating to Pelagius or his doctrines
- an adherent of the doctrines of Pelagius
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” (cf. Greek pelagos “sea;” see pelagic). Related: Pelagianism.