What do you mean, “spiritual”?

We hear the term often- but what does it mean? Is it religious, or not?
At one point in the history of our continent it would definitely have been connected to religious beliefs. And often those religious beliefs were strong, and unbending.
When we hear the term Spiritual today it most often refers to someone who is NOT religious, but believes in a divine Source, a greater power, God, or Universal Spirit. Something bigger than we are, that is greater than us, yet part of us and that we are part of.