definition of
imperfect

[1] #1 imperfect s. [fallible, frail, weak] wanting in moral strength, courage, or will; having the attributes of man as opposed to e.g. divine beings; "I'm only a fallible human"; "frail humanity". wn

[2] #2 imperfect n. [progressive, progressive tense, imperfect tense, continuous tense] a tense of verbs used in describing action that is on-going. wn