This is the eventual adaptation to make sense in the Tiering system for people to get a general application, but it's actually the same thing I said. Dimensions are just dimensions, they are axes that describe the position of points across n-dimensional space-time. A hyper timeline is just a way of trying to describe causality happening between two different timelines encompassed by a singular causal connection, that is, something that happens in one affecting all of them. That happens because the effect affects not just a singular timeline, but all of them. As such, that effect is described by the number of dimensional axes related to the overall affected space-time, which is at least 5-dimensional for parallel timelines. It's basically the same as a multiverse, but instead of being defined by the idea of spatial access, it's done by the idea of causal connection across multiple temporal links.