What is the meaning of imperfect?

noun

• A tense of verbs used in describing action that is on-going.
  • synonyms: progressive, progressive tense, imperfect tense, continuous tense

adjective

• Not perfect; defective or inadequate.
  • usage: "had only an imperfect understanding of his responsibilities"; "imperfect mortals"; "drainage here is imperfect"
• Wanting in moral strength, courage, or will; having the attributes of man as opposed to e. G. Divine beings.
  • usage: "I'm only a fallible human"; "frail humanity"
  • synonyms: fallible, frail, weak