(NOT PERFECT) [adjective] - containing faults or lacking something importantThere were some clothes marked imperfect which they were selling off cheaply.We're living in an imperfect world.I explained as well as I was able, given my own imperfect understanding of the situation.
IMPERFECT
Meaning of IMPERFECT in English
Cambridge English vocab. Кембриджский английский словарь. 2012