(1):

(v. t.) To charge; to ascribe; to attribute; to set to the account of; to charge to one as the author, responsible originator, or possessor; - generally in a bad sense.

(2):

(v. t.) To take account of; to consider; to regard.

(3):

(v. t.) To adjudge as one's own (the sin or righteousness) of another; as, the righteousness of Christ is imputed to us.