Erroneous, obviously.
The foundational meaning of a word in context is everything. That you deny that obvious reality forms the basis of your erroneous take on the matter.
No, it's not. Foundational meaning is nothing. Because words change, language evolves, perception changes.
You are denying this very obvious reality.
Marriage is not "a legal contract". Marriage, in the contextual use in this thread, is a global human cultural institution between a man and a woman as husband and wife and only between a man and a woman as husband and wife, that existed as it does now from just before the agricultural revolution over 12,000 years ago, predating religion, formal governments, and the like.
And it has meant different things to different people. To speak of a
global human cultural institution is foolish from the start, as cultures have varied tremendously across history.
Today, we document that a man and a woman are married,with respect to relevant government and private enterprise recognition of their marriage, and we document that via a "marriage license".
Proof in of itself that the cultural perception of marriage changes. Apparently people didn't always feel the need to document it. Now they do. And, really, there was a stretch where marriage was more of a sale of property. (and by property I mean the wife) As opposed to a union of two people based on this newfangled idea of "love."
But in no way does that make marriage "a legal contract".
Irrelevant. Marriage is a varying social and cultural institution. It is also, presently, a legal contract. It is both.
Marriage is and always has been what it is, as I just described. Your semantics games have no power to change that.
I am not the one basing his argument on semantics. You are. Your entire premise is that same-sex marriage shouldn't happen because of the
definition you perceive of the word marriage. You have no other argument. You are
literally arguing semantics. I, on the other hand, have a solid legal and moral argument based on our very important concept of equal protection under the law, and more than a century's worth of legal precedent to back it up. It is far more compelling than your claims of some kind of universal law of defining words. What was that you were saying about projection?
Today, an acceptable usage of the word "literally" is to mean "figuratively." Figure that one out, mister definitive propriety.