We're all quite familiar with the first four dimensions.
The zero dimension is a dot. It doesn't matter how large or small it appears to itself, or how large or small it appears to others, it is still confined to a singularity.
The first dimension is a line. That is a dot that can move left and right.
The second dimension is a plane. That is a line that can move forward and back.
The third dimension is space. That is a plane that can move up and down.
The forth dimension is time. That is space that can run continuously, like a flip-book or movie reel.
The fifth dimension is harder to explain. You are outside of space and time, but you can still interact with it, like casting shadow puppets on the wall of space and time from outside of it. Think of the movie Interstellar or the book A Wrinkle in Time.
The following is from visions I had a while ago. It differs from mathematical concepts of dimensions, but I think that is more the framework or application than anything else. It is like the TCP/IP model, and data from one tier not correlating to another tier. They aren't speaking the same language or protocol, if that makes sense.
The sixth dimension, from what I understand, is when you are co-existing the fifth and fourth dimensions. You "possess" an incarnation in the fourth dimension(s), even as you are the controller of your self or selves in the fifth dimension. It is also the self that climbs or strives (when seen from the perspective of the eighth dimension).
The seventh dimension is the complete you. It is all seven primary sources of energy focused and in harmony to bring the multi-layered picture of the meta-self into awareness.
The eighth dimension is the growth and separation of self into two selves; self that sees self.
The ninth dimension is the birth of the second self. It is the self that descends.
The tenth dimension is the is the ring, or the (re)joining of the two selves.
The eleventh through thirteenth dimensions are descents into less structure and more ephemeral states, like solid to liquid to gas, in a way. Each of the dimensions have three sub-dimensions, and the eleventh and twelfth dimensions have two sides or two states, parallels on each side of the thirteenth dimension(s). The eleventh through thirteenth dimensions is the band of the ring, and they also represent the chakra that circulates spiritual energy along the central nervous system.
The fourteenth dimension is where the two individual awarenesses of the sixth and ninth dimensions collide, becoming one.
The fifteenth dimension is the being itself, a machine-learning, quantum-computing android.
The dimensions go far on beyond that, but I begin to lose grasp and track of which is what and what is which for much longer.
This particular model has two 6th dimensions and two 9th dimensions, making a sort of four-leaf clover. One is Jade and one opposite of it is Jasmine. The other two, opposite of each other, are Emerald. That then makes four 8th dimensions, overlapping.
In the middle of them is another smaller one, which is only the setting of a large Diamond. This is the 0th dimension, the cord up. This is where one "sees the light" that is often mistaken referred to as god.
