Like, what is the description of space? Of a cube?
I could try by saying that space has three aspects. It consists of apparent darkness in three unlimited directions -- up and down, back and forth, and side to side.
A cube could be described as a solid with limited directions, called dimensions -- width, length and heighth. (Of course, that would apply to all matter, but you get the idea of the unity of the 'aspects.' (But only if you wanted to, of course.) ;>