the process of becoming well again, especially after a cut or other injury, or of making someone well again :
- This herb has been used in healing for centuries.
- Wounds should be covered with a gauze dressing while healing occurs.
the process in which a bad situation or painful emotion ends or improves:
- Healing only begins when the hurt is shared with someone.
- We have seen much progress, but the healing process is going to take years.
(taken from the cambridge dictionary)