system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: The fourth dimension.

In a math class I just finished, I had a professor try and explain it, but the concept is just so far beyond me that I barely understood anything.  Is there a simple way to explain it?
gpt
In theory, it's fairly simple, but imagining is kinda difficult since we live in an inherently three-dimensional world. Time is often thought of as the fourth dimension, since it often makes most sense. For example, the coordinates for this specific place now and yesterday could be said to be (X,Y,Z,T1) and (X,Y,Z,T2). Mathematically speaking, it doesn't have to be time, just a coordinate axis you can't get to using the other axi.

Another way to look at it is this:

0d is a point.

1d is infinite amount of points. (line)

2d is infinite amount of lines. (plane)

3d is infinite amount of planes. (space)

4d is infinite amount of spaces.

5d is infinite amount of whatever you called that last one.

6d -||-