@Mel Your definition of spirituality is very profound and provocative.
As for how I define spirituality, I agree with the idea that the spirit is the intangible essence of the tangible individual, and I am in sync with the cliche that spirituality is about getting in touch with yourself. To me, this includes listening to your inner voice which is your guide through the external world and a channel for the instincts that remind if it does not feel right to you, it is not right for you. (Which is why I appreciate Shakespeare advising: " this above all, to thine own self be true".)
I also think that spirituality is about acknowledging your own divinity and realizing that "god" is comparable to your higher self divested of the ego that reduces you to being human. This is my belief and something I contemplate on my current spiritual journey to seek the truth, keeping in mind what The Prophet Khalil Gibran warns: "say not that I have found the truth, say rather I have a found a truth while walking along my path." Again I can only resort to cliches when I concur with the idea that "the truth will set you free".( Even if it hurts, it is a spiritual wound that heals itself as you meander through a world of deception.)
BTW, I do appreciate the necessity and the beauty of language, but on a spiritual level I think words are some times inadequate, and the closest they come to adequacy is when they defer to "reality" and say that "it is, what it is".