Yes, it is the original meaning of the phrase "Natural Born citizen," though some disagree as to whether it also requires you to be born on US soil. It doesn't really matter, since no matter what definition you use that was extant during the time of the founders, none vindicate Ted Cruz.
And the section of the Constitution where it is defined?
It doesn't really matter, since no matter what definition you use that was extant during the time of the founders, none vindicate Ted Cruz.
Unless he was naturalized after birth, I assume you have no proof he was, the fact that he is a US citizen can only mean he was at birth. If citizen at birth isn't natural born, then what is it?