May the peace radiate also back to you!
Hey, nice topic, gotta say that first.
And I think I've got something to give to it: as of been studying Spirituality and its world traditions in the University of Theology.
Referred said, the things that usually combine the conceptions about the word "Spirit" in the traditions of the world's spirituality (transferred to this West European style of thinking and its concepts) are the next:
1. There is a consept of a Spirit, the Life-Soul, the Source of All Life, whose essence is seen through a spirit to be a Spirit. That experience flows from some core experience of beign alive - at least in your own questioning about yourself.
2. The "little" spirit then is a part of the Spirit. An animal, a plant, a rock, a human. Spirit with lil. s is a subject, more accurately said subject's deepest core of being (the being we can divide to several analytic sectors, like mind and so on, through our experience), in the web of spirits in a Spirit.
3. Then a Spirit-spirit duo and this dividing reflects
a communication. Althought all Life is one in a Spirit, it lives in a dynamical way. And the result of that is a communicative experience of a spirit. Spirit/spirit is then a key result of the life's greatest mysteries - and its joys and faith.
4. Spirit is a living, communicative mystery of all Life. And that's the story even the etymology tells us. The English word spirit comes from latin, spiritus, and its primary meaning has been "breath". These days, even in my native language, Finnish, word "henki" means the spirit, and "hengittää" (which could be also "spiritize") means to breath. So there is a connection. And what does it tell us?
That spirit/Spirit is something living. We breath it in and out. Spirit with a spirit. And there we come to the term "spirituality".
5. Spirituality is then "breathing". Can you see the mystery behind that word? Yes: the physical is in connection with the spiritual. Breathing is same time both spiritual and physical, for they both are and reflect the same. Then spirituality is something to live with all life's sectors. To live in balance with the Natural breathing of soul and body. To inhalate the divine, listen to it, let it inspire you; to exhalate the unnecessary, even deadly to you, but which the divine can take. And it is something we need - that touches our deepest depths of life. It is the basis of our being. If you try to keep that spirit or "hengitys" too long, it forces you to breath, because you just need it.
And thinking about it. Where does our inhalation draw in our physical form? -From the TREES and the nature! And the physical was same time the spiritual too..
So Spirit and Spirituality...
... something to live through, not to define fully. We can't do it 100%, because we are a vital part of that process and inside of it. It is the Thing that the word Spirit refers, that defines us.
The thing we can do with it is to understand the discourses and meanings behind the contextual social situations, where people share their experience of a spirit or the Spirit.
"Language by it's nature, carries with it assumptions and walls that we do not even recognize which limit the ability to answer this question. Nonetheless, words are all we have on this forum." - like Paul said before.
That's why I call for the paradigm of understanding and empathy in these circles of social waves. There are no "truths" inside words - you can only try to get nearer to the experiences, just to find the same Source that you are trying to reach in your experience.
And I have left out the exeptions, which are quite a many in numbers. We have always to be careful with our use of language and its culture-mental traps. So, like many spiritual traditions say wisely: we should walk back from our cultural ideas to the source of feeling the experience of Spirit, Personality, whatever you name it. Not to speculate in ivory towers too much with our indo-european style of defining and chipchopping things.
Rather than that...
... let's go to the forest and FEEL the Unity!
To Breath with those TREES, my friends!

The final answer of mine:
one of the symbols to refer to the feeling that we, as a part of something, join in the communication of One Life.