ONANISM Meaning of ONANISM in English [onan.ism] n [prob. fr. NL onanismus, fr. Onan, son of Judah (Gen 38:9)] (ca. 1741) 1: masturbation 2: coitus interruptus 3: self-gratification -- onan.is.tic adj Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012