Noun

1. A change for the better as a result of correcting abuses
2. A campaign aimed to correct abuses or malpractices
3. Self-improvement in behavior or morals by abandoning some vice

Verb

1. Make changes for improvement in order to remove abuse and injustices
2. Bring, lead, or force to abandon a wrong or evil course of life, conduct, and adopt a right one
3. Produce by cracking
4. Break up the molecules of
5. Improve by alteration or correction of errors or defects and put into a better condition
6. Change for the better