The 2nd Dimension:

The second dimaension has a bit more than the 1st dimension. In fact, you are staring at the 2nd dimension right now..
because this monitor displays things that are in 2D! In the second dimension there's up, down, left, and right, but no forward and backward. Anything displayed on your monitor can't come through the screen because then that'd be 3D (and technologically impossible right now) so thats the gist of the 2nd dimension. If you place me in that square right there and you had to describe my position, the only coordinates you'd need to know are my x and y coordinates. Thats what makes it TWO dimensional.