Correct, rectify, emend, remedy, redress, amend, reform, revise mean to set or make right something which is wrong.
One corrects something which is inaccurate, untrue, or imperfect or which contains errors, faults, or defects, when one by substitutions brings it into conformity with a standard or rule of accuracy, truth, or perfection.
Also, one corrects a person when one points out his errors or faults for disciplinary purposes (see also PUNISH).
One thing corrects another thing when the former serves to counteract or neutralize the bad effect of the latter.
One rectifies something which requires straightening out or ordering because it deviates from the rule or standard of what is right, just, equitable, or properly controlled or directed.
One emends a thing when one frees it from error or defects; specifically an editor emends a corrupt text when he replaces doubtful readings with others that are judged to be closer to the original or to the intention of the author.
One remedies something which is a source of evil or harm when one makes such corrections as will either bring about its eradication or restore what is harmed to a normal, sound, or prosperous condition.
One redresses something which involves unfairness, injustice, or lack of proper balance; the word usually suggests reparation or compensation.
One amends something when one makes such corrections or changes in it that it is bettered or raised to a higher standardc.
One reforms something when one makes drastic changes in it in an attempt to eliminate imperfections; the word usually implies a new form or character.
One revises something when one looks it over to discover where it requires correction or amendment and makes the necessary changes.