I hope it's alright to ask this here. I'm asking about existing theories, so I don't think it counts as speculation (though I could be wrong),

also, this is kind of long. I was going to ask this on quora, but I'm way past the character limit, and I might get better answers here anyway. I'm trying to understand how four (or more) dimensions could exist (without math, btw).

The fourth dimension is often described is such a way, that I understand it to be an impossible vector.

From what I do understand, dimensions are traversable, spatial vectors. A point is non dimensional. A line (x) is one dimensional. Two lines (x, y) intersecting at a right angle is two dimensional (and forms a plane). And three lines (x, y, z) intersecting at a right angle covers three dimensions.

That being said, how can there be four dimensions, when three dimensional vectors cover all directions? I know that some people point to time as a fourth dimension, and this may (or may not, idk) make some degree of sense in mathematical terms (perhaps useful in calculations), but not in a literal sense, as “time” cannot actually be described as a dimensional vector.

Time, as I understand it, is simply a measurement (for rate of change). There is no spatial, traversable vector known as time. Only the present moment exists. The past is a recording, a memory, which exists in the present, stored chemically, digitally, etc. the future is merely a forecast, based on past experiences (memories), and also exists only in the present moment. There is no time vector. This is the reason that time travel is impossible (unless someone can think of a way to track and reverse the trajectory and compositional/chemical/energetic changes of every particle within a given area, which I think is virtually impossible).

I’ve heard somewhere that “higher” dimensions could be the vectors between "points" composed of three dimensions (3d universes like ours); --which, if this is the case, would require the multiverse theory (or something like it)-- basically, this theory stacked all the way up to ten or eleven dimensions, by theorizing (I think) six and nine dimensional points (basically super 3 dimensional points? which are already super points?), and that the highest possible dimension (10 or 11, the master universe, or universal hub) would contain all possible realities. (I do not know the name of this theory, or whether is it reputable... I think heard about it on youtube a year or two ago).

This theory makes much more sense to me than the idea that there are impossible spatial vectors making up “higher” dimensions, and that we’re all just too simple do conceptualize them; But a lot of people seem to believe exactly that. There are even these shapes that are supposed to represent fourth dimensional “shadows” or “cross sections”, and an inside-out jar that’s supposed to be continuous if it were fourth dimensional. But I honestly think that this must be the result of a misconception, possibly based on a confusion between reality, and the tools with which we measure it.

So am I wrong about this (or right)? If so, why? (and please no equations, I’m not a math guy. seriously, arithmetic is my limit).