This is my first post in this forum. I believe that I have thought about another fourth dimension. I would explain my idea below.
The words I used "not-physical" is the beauty and the concept of my idea. The idea I have is:
"We are all human beings. We have experienced three dimensions (or maybe more, as many people say) but these all dimensions are physical. They are related to our physical being. I have thought of a dimension which is more of a not-physical. Basic idea: When you sleep you actually slip from the three (common) physical dimensions to the fourth not-physical dimension. Normally people think that whatever happens in the dreams is not real and is mind games. I say whatever happens in the dreams is 100% real but as it is not related to the physical medium so you cannot experience the feelings when you wake up.
Main points:
1) This 4th dimension is not a physical dimension
2) There are two mediums in our life: physical medium, which holds the three normal dimensions; not-physical medium, which holds the fourth dimension.
3) Everything which happens in the fourth dimension is 100% real but as it is not related to the physical medium. We cannot experience the same feelings when we slip back to physical medium.
4) Both mediums are going parallel.
5) The physical medium ends at some time, as it is related to the concept of time.
6) The not-physical medium never ends as there is no concept of time related to that.
7) When you are asleep/unconscious/dead you slip from the physical medium to the not-physical medium.
8) The journey from the physical medium to not-physical medium or vice-versa is not instantaneous (it can never happen within seconds, because there is no time concept related to the not-physical medium)
9) Everything in the not-physical medium is 100% real. For example, if you slip from physical medium to the not-physical medium (common case is when you sleep) everything which happens in the not-physical medium is as real and as true as is in physical medium. When you come back to physical medium you can relate everything happened in the not-physical medium to everything in the physical medium but the feelings are different in both the mediums.
10) There is no concept of time related to the not-physical medium, so, you can cover infinite distance in that medium and you can pass an infinite length life in that medium.
Extra point
11) That medium was created by the almighty to make a medium for the impossible things (infinite length things) to happen
Examples
1) A lady had a brain tumour and she was carried to the hospital and the doctors made her unconscious. So her contact with the physical medium was lost and her contact with the not-physical medium started. Then after the operation the lady related that she felt that the doctors were working on her legs part and she was amazed that the operation was for her brain tumour. The doctors told her that it is 100% true as they were gettin skin out of her legs to put that on her forehead.
Explanation
The lady moved from the physical to not-physical medium but as I said there is a relation between the physical and the not-physical world (that's why I said its the fourth dimension). The lady in her not-physical medium realized everything which was happening in her physical medium and that everything was real. So she traveled from the physical medium (three dimesions) to her not-physical medium (fourth dimesion).
2) In this physical medium it is impossible to reach far away, for example, we cannot travel to Pluto in this physical medium. But the not-physical medium is independent of time and distance concepts. So we can travel where ever we want and everything we do in that not-physical medium is totally real but it holds for that not-physical dimesion.
Thats why every prophet met GOD or got revelations from GOD in their dreams. Because it is impossible to travel to GOD in the physical medium but it is easier (for a pious person in case of meeting GOD

For now this is all I have to say, think about it guys.
Edit by iNVERTED: Fixed spelling and grammar.