unperfect UK /ʌnˈpɜːfɪkt/US /ʌnˈpɜɹfɪkt/adjective 1/ʌnpəɹˈfɛkt/ verb 1forms 5 adjective1 •imperfectAs an unperfect actor on the stage, Who with his fear is put besides his part — 1609 unperfect UK /ʌnpəˈfɛkt/US /ʌnpəɹˈfɛkt/ verb1 •To mar or destroy the perfection of. formsunperfected · unperfecting · unperfects · more unperfect · most unperfect