Definitions of private:

• noun:   an enlisted man of the lowest rank

  Example: "Our prisoner was just a private and knew nothing of value"

• adjective:   concerning things deeply private and personal

  Example: "Private correspondence"

• adjective:   confined to particular persons or groups or providing privacy

  Example: "A private place"

• adjective:   concerning one person exclusively

  Example: "Each room has a private bath"

• adjective:   not expressed

  Example: "Secret (or private) thoughts"