Sure, there are one or two well-known explanations out there, such as the satirical Flatland novella from 1884 (written by Edwin Abbott under the pseudonym “A Square”) and the very fun educational videos based on it. Those are largely allegory and metaphor – still, they offer a way to comprehend what encountering another dimension might feel like from a perspective used to living with four, even if they’re not really about the additional dimensions in themselves. Most of the time, when we actually dig into what it might mean for there to be extra dimensions, there’s a whole lot of hand waving, perhaps a little confusion, and then we move on.