This meaning is used when someone wants to feel calm and free of stress. It can apply to both body and mind.
I like to relax after work.
Let's relax on the weekend.
This meaning refers to physical relaxation, where one wants to ease tension in specific muscles or areas of the body.
She needs to relax her shoulders.
Relax your muscles during exercise.
This meaning is used in a formal context where strict rules or policies are made less severe.
We need to relax the rules for a while.
The company will relax its policies soon.
This meaning refers to the state of mind where a person feels calm and is not troubled by concerns or stress.
She can relax knowing everything is fine.
He felt relaxed after the good news.