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.
They
have, or
can have meaning. This is not the problem at all.
Defining "God" as Miley Cyrus, or "Deity" as Bob Dylan most certainly does have meaning. Furthermore, defining "God" as money, family, science, love does have plenty of meaning too. But these are metaphors, and presumably not the subject of a discussion about wether God exist. Just like, when you are/were discussing the existence of dragons, you certainly would not be content if somebody pointed out this far eastern country called China (aka Great Dragon) to you.
It is presumably not about concepts either. (I hope I am putting that right) Defining God as for instance necessary being, or maybe the cause for the universe, or the source of morality, or ... is easily done, but hardly what matters. This can be likened to a discussion about circles, or mountains. If we have a circle, then by definition we also a have a center of that circle; if we have a mountain, then we also have a peak of that mountain.
One problem here is, that while we know
that we have a center of our circle, or a peak of our mountain, it does not tell us squat about
what that circle, peak is. Likewise, if we know that we have stuff that exists, we can easily say that amongst this stuff there is that which not contigent upon anything else.
And fair enough. But this does not tell us anything about
what it is.
Another problem is, and this is far more grave than what I have outlined in the previous paragraph, that these concepts of God oftentimes fall woefully short of how the word is used in everyday language. 'Anthropomorphic skydaddy' vs 'cause of the universe', to cite a crass example. If you want something a little less strawman-ish, then I can offer 'concrete explanation of the universe' vs 'abstract cause of the universe.'
Now, that I have outlined definitions of "God" have meaning, there are also meaninless instances of the word "God."
It is meaningless to cast God as a concrete explanation of how the universe and/or life and/or our moral values come to be, and then utterly fail to provide any detail, or at least any meaningful detail, of how precisely this looks.
For instance, if somebody demands concrete explanations for universe/life/morality/etc without God, he is implicity casting God as a concrete explanation for universe/life/morality. If we now go and look at precisely what this explanation
is and find nothing, then "God" is meaningless. Presumably, without positing a God, we have to say that we cannot explain the universe and that we don't have idea how it is possilbe. Now, with positing a God, however, we
still cannot explain the universe and we
still have no idea how it is possible. What we do have though is a label for that cluelessness, the euphemism "God."
We can even take this a step farther extend this to flowery statements such as "God speaks the universe into existence" or some such. But is this not just another label for "We don't know"? An unknown mechanism, labelled as "speech", and an unknown cause, labelled as "God", still fit the bill of "I don't have any idea."
If we wish to explain stuff, I think, this involves quite some hard work. If, in the end, we can even agree on the proposition that we can not explain and/or know certain things, then we cannot also go and act, behave, walk and talk as if we did explain/know these things.