I was trying to figure out the answer to this question when i came across my notes of a talk by the DO in the 09 circuit convention. He said the world defined "spirituality" however it would suit them; according to their own religion. He gave example definitions of spirituality (being in touch with nature, spiritism, going to Church and reading the Bible, etc.) And then he revealed to the audience what spiritualy REALLY is: "Having Jehovah's point of view on matters and acting accordingly" (Rom. 8:5).
I remeber thinking "I really gotta memorize that". I only think of memorizing things when they are not logical enough in my head, so I just have to keep them as word-by-word truths for future reference.
But now I think Jehovah's Witnesses' definition is also whatever suited them. So what does "spirituality" really mean?