If I may add my 2 cents worth here??
I agree with your definition msac 9312. I know atheists that are very spiritual people. I believe that if someone is content with their life, with their belief system or lack thereof they have mastered a way of living that many others only dream of.
Spirituality can but does not always have to be bundled with religion. It is more a state of being I think. Maybe it is like when we see something of beauty or are inspired by a particular song.. It touches something down deep inside that we cannot fully explain and yet it can change a mood from sadness to peace or joy. It touches our spirit inside. These are just my assessments????,,,dave