It might seem like a strange or stupid question, but I really don't know. Of course I know those three basic dimensions, height, length, width, which we all learn in school, but I can't seem to grasp how Time fits into that row. I also read this theory about a ten-dimensional universe that split into ours and a six-dimensional universe at the big bang. What would those extra dimensions be? I don't really understand, so I thought I'd start with a basic question, what are dimensions? Oh, and I'm sorry if this is not the right forum, but I really can't tell where this question would belong.