Did my post at #66 help you at all?
In a nutshell, natural born = born in the U.S.A. [native born (jus solis)] + citizen parents [derived citizenship from parents (jus sanguinis)].
Neither Senator Barak H.Obama II nor Senator John S.McCain were eligible to serve as President.
NO, that is not necessarily the ONLY meaning and SCOTUS admits it is not settled law during an oral argument.
It MIGHT be the only meaning or it MIGHT NOT be the only meaning. If you listen to the oral argument I have suggested everyone who posts on this topic should listen to..you will see the Justices have differing opinions as to the requirements.