(1):

(v. t.) by supplying deficiencies;

(2):

(v. t.) by substituting something else in the place of what is removed; to rectify.

(3):

(v. i.) To grow better by rectifying something wrong in manners or morals; to improve.

(4):

(v. t.) To change or modify in any way for the better

(5):

(v. t.) by simply removing what is erroneous, corrupt, superfluous, faulty, and the like;