What is Private ?
Private is (adj) 1. which belongs to one person, not to everyone He flew there in his private jet. 2. which refers to one particular person and should kept secret from others You have no right to interfere in my private affairs. This is a private discussion between me and my son. in private away from other people She asked to see the teacher in private. (noun) an ordinary soldier of the lowest rank (NOTE: can be used with the surname: Private Jones)
source: Easier English, Student Dictionary Upper Intermediate Level