I have my own ideas about what "spirit" means, which is a different subject and context to the thread. Somebody mentioned being created in the image of God, and somebody else commented about God having a physical body.
Since I am in no way an ancient Hebrew, Aramaic or Greek scholar, nor am I an expert in the culture and times of the writings of the Bible, I cannot say what the writers might have meant by the word "spirit", other than guess with my western perspective. Anyone can look for themselves if they're so interested.