Entry 1 sense Webster, 1913 Christianization /krĭsˌ-chən-əz-āsh'-ən/ · Chris·tian·i·za·tion · IPA /krˌɪstʃənəzˈeɪʃən/ 01 n. The act or process of converting or being converted to a true Christianity. 1. The act or process of converting or being converted to a true Christianity.