Abstract or not?

[lespol]

Hi everyone, I think that 'day' is an abstract noun. Am I correct? And what about 'air', is that abstract too?
Many thanks,
Les

[Tdol]

'Air' has a physical existence, so I wouldn't call it abstract.

[lespol]

Thank you Tdol. Again you have helped me. I suppose that 'day' is abstract then.
Again thank you,
Les