Entry 1 sense Webster, 1913 Manumission /mänˌ-o͞om-ĭsh'-ən/ · Man·u·mis·sion · IPA /mænjʊˈmɪʃən/ 01 n. The act of manumitting, or of liberating a slave from bondage. 1. The act of manumitting, or of liberating a slave from bondage.