Pronunciation IPA (key): /ˈreɪpɪst/ Noun Singular rapist Plural rapists (countable) A rapist is a person who has committed one or more acts of rape. The police went into the house and arrested the rapist after 3 girls reported having been raped by him. It is possible, although unlikely, for a woman to be a rapist. Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads