pre·des·ti·nar·i·an I. \(|)prēˌdestə|na(a)rēən\adjective Etymology:predestination + -arian (as in trinitarian, adjective) : of or relating to predestination : holding the doctrine of predestination II. noun (-s) Etymology:predestination + -arian 1.: a believer in especially theological predestination < the nature of man is a subject for quarrels between … free-willers and predestinarians — J.R.Chamberlain > 2.: fatalist