Entry 2 senses Webster, 1913 Legitimation /(-mā"shŭn)/ · Le·git·i·ma·tion · IPA /lɪdʒɪtɪˈmeɪʃ(ə)n/ 01 n. The act of making legitimate. 1. The act of making legitimate. “The coining or legitimation of money.” — East. 2. Lawful birth.[R.]