When someone says they are spiritual and also agnostic-atheist, I always wonder, "Do they believe there is something in addition to or beyond the natural world, like a "spiritual" heaven?" GROG
@Grog go to this discussion "SPIRITUAL: A Third Definition" there you might find definitions to explain what some people mean by spiritual.
I have a pretty good idea of what they mean by being spiritual. I see spirituality as an internal/personal thing with no supernatural connection. We are all connected, but it is mainly biological. We have all grown up together. GROG
I think one form of human spirit is the aspiration to do or be better.
In relation to being better, we could strive to know how to align ourselves with a greater spirit.