impenitent UK /ɪmˈpɛnɪt(ə)nt/US /ɪmˈpɛnət(ə)nt/adjective 1noun 1forms 1 adjective1 •Not penitent; specifically (Christianity), not repenting of one's sins; unrepentant.[I]f they mende and repente better, will in stede of purgatorye which they nowe mocke & ieste at, wepe and repent in hell this foolish fruitlesse fashion of their impenitent repentance. — 1532 noun1 •One who is not penitent. formsimpenitents