adjective, noun
adjective containing faults or mistakes; not complete or perfect:
an imperfect world * an imperfect understanding of English * All our sale items are slightly imperfect.
imperfectly adverb
noun (the imperfect) (also the imperfect tense) [sing.] (grammar) the verb tense that expresses action in the past that is not complete. It is often called the past progressive or past continuous:
In 'while I was washing my hair', the verb is in the imperfect.
