As we all know, the Constitution isn't meant to be a dictionary where everything is spelled out.
We must look to the references they were familiar with at the time.
There was one such reference, a well know and respected legal treatise, that they read from and used during their debates while crafting the Constitution at Independence Hall, Philadelphia, and it defined a natural born Citizen.
Yeah. Well if that was the one accepted definition of natural-born citizen then why were people like Rawle and Madison saying the opposite? See reply #114.