Particulars assumes that you've already taken that one position more seriously than all the other competing ones. Why should I take your Catholic Christian perspective as more serious than say a Deist or Pantheist's perspective and definition of GOd? That's a basic difficulty I've had since I was in college at least.
I am not interested in apologetics in this thread. It is meant, for me, to be a discussion about whether definitions of "God" have meaning.
At the least, you must admit the term "God" becomes superfluous, since it can apply to anything from a rock to the universe to some magical sky daddy.
So what would you use to replace it? For instance in the bible's "God created the heavens and the earth"?
Reality is almost necessarily accepted by metaphysicians to an extent as necessarily subjective.
Not agreed on. I think that for a psychologist "world views" would be subjective, but most philosophers, when they say for instance that monkeys exist whether we like it or not, or whether we percieve them or not, mean just what they say.
God, on the other hand, is viewed by many I've read to be something beyond our perspective and perception thereof, very much an objective thing/entity. The meanings associated to God are not what I am denying, in fact, I'd accept those as valid.
Ok you are not ignostic then *smiles*
What I don't accept is that people can say they're being fair in equally asserting that they can call their definition "God" as much as the next person, since clearly everyone can't be equally right about what is supposedly an objectively existing thing that has properties completely separate from what we believe about it, right or wrong.
Agreed that if there is a god, then not all definitions can be right if they are inconsistent. As an aside I think that the idea that we can just invent god concepts willy nilly is a bit strange, personally. Maybe we can invent "clothing" concepts willy nilly, and wear fresh air?
And with cats in a cellar, the point seems to be that theology and speaking about God are so rooted in personal faith, you can find anything in the universe or your sensory experience or psychological experience and then turn it into God and no one would question you since it's a matter of FAITH.
Not agreed. You cannot just make the term "God" mean anything, otherwise it will stop having adequate relationship to the core family of qualities. For instance I can't say "this baked bean is God, and I don't mean a creator or superintelligent being of some sort, but I simply call this baked bean "God", perhaps because it's a pinky orange colour, and define it as God, and that is that!" That would be to ascribe a name to something, rather than to thing that something to have divine attributes. It would be asking to saying "Ok officer, I may appear to be naked, but I define fresh air as clothing." See how that one stands up in court!
I think that there is a sorry trend on the internet that says "because there is such thing as a stipulative definition, all definitions are arbitrary and made up. For instance I can define "cat" as "dog" if I like, and this is as good English as anything else".
The quote from Heinlein continues to say that theology is, I'm paraphrasing, useless and doesn't do any good.
Hes entitled to his own opinion, but I don't think too much of it so far.

You yourself have said that specific definitions of God make semantic sense, so the term can't always be practically redundant.