What does "spiritual" mean to you?

Spiritual means to me "of the Spirit".

Spirituality therefore means, "the expressions of the Spirit." That's using a Christian context; what a Christian might think is the best expression of spiritual things.

The ability to come to Christ is a spiritual expression. Not everyone can bring themselves to do it because it's natural for humans to reject it. The influence to come to Christ in faith (pisteuo- trust; confidence) is a God-given ability. It is exercised every time it's practiced, and it's such an esoteric teaching that not a lot of Christians can understand it or articulate it even if they could understand it.

As for your comparison, I don't include all spiritual things in a group that is capable of being controlled by Man. It's as though it's being asked if it's an all or nothing ability. As I understand it, God can grant abilities according to his will without having to give that gift always to a person. Those gifts come from God, and are taken away by God according to his authority. He didn't want Man to control much concerning spiritual things.

Extra-terrestrial life.

It is obviously not spiritual, and it can be inferred to exist by a basic understanding of biology and astronomy, but it's existence can not yet be physically demonstrated in a repeatable fashion.

Spirituality has nothing to do with the belief in none existend concepts but the belief in ones self and their ability as well as the belief in ones fellow man and our ability to live a communal life without killing and eating eachother.

Do unto others is not a new concept nor is it a god given concept for Morality is simply "socially acceptable behaviours" which was required for mankind to live a communal existence.

What does spiritual mean to me? Not much.

Spiritual. Its a dumb word from any angel.

Spirit = ghosts. Aint seen none, don't believe I ever will.

Ritual = OCD. Aint got that problem.

A meaningless word that shallow people use to try to appear to be more sophisticated than they actually are.

God is a spirit person. He lives in God's kingdom in the spirit realm. The spirit realm is different from the physical realm we live in. There is no decay or death. The second law of Thermodynamics is not applicable over there. If we do what God wants us to do here on earth, when we die, we will be reborn as spirit persons in God's kingdom as its citizens.

Spiritual: Of or pertaining to the spirit.

EDIT:

I just felt like answering your main question. I didn't feel like reading all that other gobbledygook.