I voted without reading the definition of "spiritual" in the thread. I'm not sure whether I qualify as being "spiritual" in that sense..
I do consider myself spiritual because I actively try to be a good person. I fail..seeing as I don't know what a good person actually is..but I still try. I have no logical reason to try..besides it making me happier than the alternative(s)..but I don't understand why that would be the case. Typically, in every day life, if I've looked into something and found no logic, no reason, I'd dismiss it as irrelevant to my life. Just an urge that needs to be controlled. However, in this regard, despite there being no logic, or reason, or understanding, I choose to accept it as a valid part of my life..despite having no logical reason to.
I'm not even sure what "it" is...however I choose to act as if there is a solid reason for me to be living according to an ideology (which I have not defined, and arguably can't define)...despite knowing logically that I do not have a reason to do so.
I also have a strong urge that my "it" is other people's "god" or "personal happiness" or whatever..I think it's the same concept over and over..manifested in different ways. So, although I don't think I'll ever know if I understand "god" as other people see it..I do think there is at least a chance that I do in fact understand god as other people experience it...despite being an atheist.
I think such thoughts qualify me as spiritual in most people's eyes.