Definition of Pelagianize in US English:

Pelagianize

(also Pelagianise)

verb

Christian Church
rare
  • no object To hold or express Pelagian views. Also with object: to render Pelagian; to convert or conform to Pelagian ideas.

Origin

Early 17th century; earliest use found in Richard Montagu (bap. 1575, d. 1641), bishop of Norwich and religious controversialist. From Pelagian + -ize.