1st dimension: a line in space
2nd dimension: a plane in space
3rd dimension: an object with mass (width, height and length), represented as a point in time
4th dimension: a time line, where the third dimension can travel on
5th dimension: a time plane, representing the events of infinite time lines.
6th dimension: third dimensional time space, which, honestly, gets kinda confusing, but I'm pretty sure it has something to do with the infinite possibilities of time planes. As in, time planes have time lines that actually happen, but 3d time space are what could happen? I'm not entirely sure.
And on and on. My visualization of dimensions is that it infinitely repeats itself based on point, line, and plane.