It took me a while to figure out what spiritual meant to the uber JW's. A friend of mine always uses the "spiritual" word. "They are a spiritual family, he/she is a spiritual person, etc."
The spiritual word is used by the JW's to describe people who are willing to do the tasks required to be accepted by the organization (they say Jehovah). This means tasks accepted by men. They included meeting attendance, field serve us, underlining your Watchtower, commenting at the meeting (30 seconds and under please), assembly attendance, baptism, pioneering, reaching out to be an Elder or MS. The list could go on and on. You could be the biggest a** inside or outside the congregation but as long as you do the task and men can see it, you get the thumbs up (this of course depends on WHO you are).