to move away from someone, usually because you are afraid
When he started yelling, I decided to back off to avoid any trouble.
to reduce the intensity of something
The government decided to back off from its strict policies after public protests.
to stop being involved in something
After realizing the project was too risky, the investor decided to back off.
to stop trying to force someone to do something
He kept pressuring her to change her mind, but she told him to back off.