They can't mean anything because the entire concept of "dimensions" varies from fiction to fiction. Dimensions in real life =/= dimensions in Marvel =/= dimensions in Dragon Ball =/= dimensions in Fate =/= dimensions in God of War, and so on. Someone in one fiction who is considered 11 dimensional or whatever can have nothing but street level feats, and as such should be treated as such. You can't increase a characters stats based on how many dimensions they affect if they don't actually do anything with their power. The short answer I use? Look at dimension manipulation like magic. Like magic, it varies from fiction to fiction, and in fiction is often used in ways similar to magic. You can't apply dimensional tiering because fictional dimensions are not like real life dimensions, hence why they're fictional. Just like magic.
