King James Dictionary 
1. Properly, separate unconnected with others hence, peculiar to one's self belonging to or concerning an individual only as a man's private opinion, business or concerns private property the king's private purse a man's private expenses. Charge the money to my private account in the company's books. 2. Peculiar to a number in a joint concern, to a company or body politic as the private interest of a family, of a company or of a state opposed to public, or to the general interest of nations. 3. Sequestered from company or observation secret secluded as a private cell a private room or apartment private prayer. 4. Not publicly known not open as a private negotiation. 5. Not invested with public office or employment as a private man or citizen private lift.
A private person may arrest a felon.
6. Individual personal in contradistinction from public or national as private interest.
Private way, in law, is a way or passage in which a man has an interest and right, though the ground may belong to another person. In common language, a private way may be a secret way, one not known or public.
A private act or statute, is one which operates on an individual or company only opposed to a general law, which operates on the whole community.
A private nuance or wrong, is one which affects an individual.
In private, secretly not openly or publicly.
1. A common soldier.
Webster's Dictionary 
(1): ( a.) Sequestered from company or observation; appropriated to an individual; secret; secluded; lonely; solitary; as, a private room or apartment; private prayer.
(2): ( a.) Belonging to, or concerning, an individual person, company, or interest; peculiar to one's self; unconnected with others; personal; one's own; not public; not general; separate; as, a man's private opinion; private property; a private purse; private expenses or interests; a private secretary.
(3): ( a.) Not invested with, or engaged in, public office or employment; as, a private citizen; private life.
(4): ( a.) Not publicly known; not open; secret; as, a private negotiation; a private understanding.
(5): ( a.) Having secret or private knowledge; privy.
(6): ( n.) A secret message; a personal unofficial communication.
(7): ( n.) Personal interest; particular business.
(8): ( n.) Privacy; retirement.
(9): ( n.) One not invested with a public office.
(10): ( n.) A common soldier; a soldier below the grade of a noncommissioned officer.
(11): ( n.) The private parts; the genitals.