It does not define “shall not be infringed” either and I still know what it means.
One cannot naturally be an American when one is born with multiple nationalities.
“shall not be infringed” means “shall not be infringed.” That is a specific phrase which literally defines itself.
“natural born citizen” had a specific meaning at the time it was written - those born under the jurisdiction of the Sovereign. This has also been adjudicated multiple times. Your comments are simply false on this issue - not even debatable for anyone who has done even a cursory amount of research - and you have been doing this for years on end.