where actors/dancers are in comparison to each other, the spacing of the set, the significance in this spacing is also important to note when studying/rehersing a routine or aplay.
Kathakali
It means 'having to do with space', as in where the object is located from the perspective of x.y.and z axes.
Well, if you're white, I suppose flail could be one.
dance drama
I think a dance drama is something like a musical