ˈæbˌnɔɹ.ml̩ əˈfɛktɪd ʌnˈnæt͡ʃəɹəl speaking or behaving in an artificial way to make an impression not in accordance with or determined by nature; contrary to nature an unnatural death the child's unnatural interest in death not normal; not typical or usual or regular or conforming to a norm abnormal powers of concentration abnormal amounts of rain abnormal circumstances an abnormal interest in food