Entry 1 sense Webster, 1913 Perpetrator /pẽrp'-ət-rātˌ-ẽr/ · Per·pe·tra·tor · IPA /ˈpɜː(ɹ).pɪˌtɹeɪt.ə(ɹ)/ 01 n. One who perpetrates; esp., one who commits an offense or crime. 1. One who perpetrates; esp., one who commits an offense or crime.