I am not the least bit religious.
One could argue about whether I am spiritual.
I would finally say no ... whatever word fits, it's not quite that one.
I believe in one consciousness, but our separation from that consciousness is caused by our delineation of separate selves.
But to attribute, well, attributes to ourselves ... even the attribute 'spiritual' ... increases that delineation and separation.
Besides that, you will never tease out a really useful meaning from the word 'spiritual.'
This happens to be a Buddhist view, but more fundamentally a mystical view that is shared widely and can't, no more than any other mystical view, be defended or demonstrated.