MALEFACTOR Meaning of MALEFACTOR in English [ 'malɪˌfaktə ]■ noun formal a person who commits a crime or some other wrong.Derivativesmalefaction noun OriginME: from L., from malefact- , malefacere 'do wrong'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004