I ask all the time, "Define god", "What do you mean by god?", etc. I have yet to receive a convincing answer that makes sense.
It's really impossible to capture the ineffable in words. If I've never had the experience of a headache and you tell me you have one. I can ask for a definition of what it feels like. You can describe characteristics and offer the science about what is going on, but the full meaning of a headache can't be communicated fully.
If I too have had one, then I know immediately what you're talking about without further explanation.
That is why there are statements like:
Kabir says: Student, tell me, what is God?
He is the breath inside the breath."
(and)
He is the "sun behind the sun behind the sun"