Although I am personally a Christian, I believe Spirituality is growing in qualities such as loving yourself, loving others, peace, patience, kindness, goodness, honesty, tolerance, selflessness, empathy and sympathy.
I think people get hung up on the word Spirituality. I believe it is those lovely and sometimes not so lovely unseen characteristics that make us who we are. Working on them on a regular basis restores our intergrity. So I try not to get hung up on that word. Just try to be a better person all around, and you'll be a happier person all around.
The 12 Step program is a Spirtual program. Choose your own Higher Power, If he doesn't work for you, you can borrow mine.