abolitionistEnglishOxford New American Dictionaryabolitionist /ˌabəˈliSHənəst, ˌæbəˈlɪʃənəst / ▸ noun a person who favors the abolition of a practice or institution, especially capital punishment or (formerly) slavery: [as modifier] the abolitionist movement. – DERIVATIVES abolitionism /ˌabəˈliSHəˌnizəm, ˌæbəˈlɪʃəˌnɪzəm / noun