I came to this thread late (as usual), but I've read through 7 pages to come up to speed as best I can. Speaking as a linguist who has worked professionally with words and languages for roughly half a century, I would like to offer some thoughts on the subject of definitions and meanings, which are very different things.
Word meanings are complicated and messy, but they can be studied and described coherently. The late
Charles Fillmore, one of the 20th century's greatest semanticists (also a former teacher and mentor), once defined natural language for me as "word-guided mental telepathy". That is, its purpose is to transmit and receive thoughts, pieces of which are encapsulated in words. Loosely speaking, meanings are bundles of associated experiences that are common to the speakers of a language. Conventional usage shapes what a word means, and that is something which I believe
@LuisDantas agrees with. Every word carries some ambiguity and none are devoid of meaning. Otherwise, they simply would not be useful to speakers of the language. So it cannot be right to say that the word
God is devoid of meaning. Nor does the fact that its meaning is complex and messy render it any different from other common words such as
dog,
book,
fingernail, or
unicorn. I know that some people here think that the meanings of those words would be much easier to determine than
God. I would disagree, but that's because I know the extent of my ignorance about word meanings better than they know theirs.
Word definitions are heuristic statements about word usage. That is, they are intended to help someone discover a specific usage of a word in a language discourse--the piece of the meaning that a speaker intends to transmit to the mind of a listener. We never transmit the entire meaning of a word when we speak--all of its possible senses and usages. We only transmit a piece of it. So we can all admit in this thread that the word
God has more than a single definition. There are many possible ways to define it, because people intend to convey only specific senses or usages when they speak the word
God. This, I think, is what
@dybmh has been trying to say--that ambiguity does not render a word meaningless and does not justify taking a stance of igtheism.
What validates a word definition? Can we just define words any way we please? Is there any authority that can verify once and for all what a word means or what is the best way to define it? Professionals who define words are called lexicographers. They create definitions, not word meanings. Sometimes they create bad definitions, but usually not nearly as bad as the definitions that untrained, self-appointed lexicographers on the internet create. I have seen professional lexicographers battle each other over how many word senses a definition should contain and how to describe those word senses succinctly. Their fights can get even nastier than the ones in internet discussion groups, because they have bigger and nastier vocabularies to fight with.
My own opinion about igtheism, insofar as it has been discussed here, is that it makes more sense to argue over what the nouns
god (common noun) and
God (proper name) mean than whether they have meaning. If they didn't mean anything, nobody would have any reason to argue at all. Word usage is always subject to negotiation, but words are only useful if more than one person can agree on how to use the word. Otherwise, thoughts stay in that individual's head and don't get transmitted to other heads.