"NOTHING" My definition may be different from yours and different from others. Google's response is a non-human, logic-based summation of available data, including Wikipedia, NASA, Redbook, Playboy, and the Goat Farmer's Annual. There is no incentive to pursue such a conversation, when it starts with undefined terms, no parameters, and no environment in which to place it for consideration.
It will be definition-based, yes? Then why not offer a starting definition, various reactions to that definition, and go from there.
For me, "nothing" is a word that when I use it, I never stop to consider if anyone will misunderstand it. The absence of things; no, sometimes the absence of results,no, sometimes it's just a mental notation, "what did you bring?" "Nothing." Does anyone not understand that usage?
At best, all you're going to end up with is "nothing" means something that is not present; I don't think you'll narrow it down much further without precise parameters.
I've nothing else to say.
Now you understood that last sentence? If so, definition solved. "nothing" is whatever came to mind when you read that sentence. Interesting.