1. Third person singular present indicative of 'estar' combined with the adjective 'imperfeito', indicating a state of being imperfect, flawed, or incomplete
The plan is imperfect and needs revision.
O plano está imperfeito e precisa de revisão.
2. Describes something that has defects, lacks completeness, or is not in its ideal state
Your understanding of the subject is imperfect.
Sua compreensão do assunto está imperfeita.