The constitutional precedent is from the English Common Law, which predates the promulgation of the Constitution.
If your conclusion were correct, then Utah would have been admitted with polygamy. States do have many powers, but their powers do not include redefining marriage.
Well, now I know for sure you're a troll, er, subject.
States do have many powers, but their powers do not include redefining marriage
Um, once again, where does marriage appear in the Constitution?
What is the definition of marriage in a dictionary?
Do you understand semantics?
Words do not require laws.