Again, if you find it meaningful to ascribe a particular non-belief to something which is not capable of holding any beliefs, that's your prerogative. Personally, I prefer to use meaningful categorizations which actually provide informational significance. I realize that not everyone is as interested in organization, efficiency, and applicability as I am though.
Meaningful is subjective. Meaningful depends on purpose or message that we desire to send depending on circumstance.
It seems like an applicable label according to its actual meaning in accordance with the OD.
I understand in all your awesomeness you may overlook other people will have their own ways to organize express and apply meaning
There is no significant difference, the way you use the definition, between the god that the person is ignorant of, the Eiffel Tower that the person is ignorant of, and the teapot oribiting Mars that the person is ignorant of. Each of these things* occupies precisely the same place in the same nowhere. In fact, they are effectively precisely the same thing.
Nothing.
*and everything else that they are ignorant of
Yes, it seems like you have that clear.
The baby doesnt believe in god therefore he is an atheist by OD definition.
If there was any label for aeiffeltowerist ot sumething, the baby would likely also be it.
Atheist can be a silly weird label to begin with. It actually is a silly weird label to begin with.
If you dont want to use ODs definition, that's cool.