Amend

v. change, alter; improve; improve oneself

An amendment is a change to the constitution of a nation or a state. In jurisdictions with "rigid" or "entrenched" constitutions amendments require a special procedure different from that used for enacting ordinary laws.
See more at Wikipedia.org...

Verb
1. make amendments to; "amend the document"
(hypernym) revise
(derivation) amendment
2. to make better; "The editor improved the manuscript with his changes"
(synonym) better, improve, ameliorate, meliorate
(hypernym) change, alter, modify
(hyponym) relieve, alleviate, palliate, assuage
(cause) better, improve, ameliorate, meliorate
(verb-group) better, improve, ameliorate, meliorate
3. set straight or right; "remedy these deficiencies"; "rectify the inequities in salaries"; "repair an oversight"
(synonym) rectify, remediate, remedy, repair
(hypernym) correct, rectify, right

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

(v. t.)
by supplying deficiencies;
  

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

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

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

To change, to revise, usually to the wording of a written document such as legislation. - (read more on Amend)