Dic: personal (one of its comprehensive meanings)

• He was a personal friend whom I've known for many many years.

6. ADJ | A personal relationship is one that is not connected with your job or public life.


Cf. 1. ADJ : ADJ n | A personal opinion, quality, or thing belongs or relates to one particular person rather than to other people.

• He learned this lesson the hard way from his own personal experience.     
• That's my personal opinion.     
• books, furniture, and other personal belongings.     
• an estimated personal fortune of almost seventy million dollars.

.... Cobuild