Excellent question, Jorwat. Let's follow this way of describing my framework for imagining the dimensions.
If you accept spacetime co-ordinates to be four dimensional, then (0,0,0,0) and (0,0,0,1) will be in the same place, but a different time (for the purposes of this discussion, let's ignore the fact that every celestial body, including the planet we're on, tends to be moving and rotating and orbiting and doing so within an infinitely expanding system, etc.). For example, one co-ordinate set could be the tip of my nose now, and the other could be the tip of my nose a second later. Moving from (0,0,0,0) to (0,0,0,1) would require you to move through all the steps between that 0 and that 1, and in quantum physics the discrete packets moving along that line are called quanta
http://en.wikipedia.org/wiki/Quanta.
Therefore (0,0,0,0,0) and (0,0,0,0,1) must be in the same place and time, but a different time line. For example, in one timeline Elvis is still alive, while in the timeline we're on he died thirty years ago. According to my framework for imagining reality, this is the fifth dimension. How would we imagine the quanta that get us from that fifth co-ordinate being a 0 to it being a 1? At first this appears to be binary - either Elvis is alive or he isn't. But to imagine that at this instant in spacetime, the only thing we were now going to change was whether Elvis is alive or not, we would again have to imagine that we are moving through many intermediate steps - those steps would include many quanta, and would have to pass through Elvis died 20 years ago, Elvis died 10 years ago, Elvis is still alive right now. But of course once you arrived at this new (0,0,0,0,0,1), it would be only of the many possible outcomes - you could be in the one where Elvis is alive but in a coma, or you could be in the one where Elvis is on tour and the Rolling Stones are opening for him, and so on.
Almost a hundred years ago, Kaluza proved, and Einstein eventually agreed, that our universe is defined with five, rather than four dimensions
http://en.wikipedia.org/wiki/Fifth_dimension . For some reason this fact has never really made its way into the mainstream public's consciousness. So now, what is the next degree of freedom afforded by the sixth dimension? What is the possible difference between six zeroes (0,0,0,0,0,0) and five zeroes and a one (0,0,0,0,0,1)?
Let's recap: we've defined the first three zeroes as the tip of my nose, an abritrary x,y,z spatial co-ordinate. The fourth zero is an arbritrary point in time, which we'll call "this instant", but of course even speaking those two words forces us to pass through many such instants. The fifth zero defines the logical point resulting from the previous choices, which is like Feynman's "sum over paths"
http://en.wikipedia.org/wiki/Sum_over_paths : so (0,0,0,0,0) could be defined as the universe where Elvis died thirty years ago, or we could arbritrarily define (0,0,0,0,0) as a version of our universe where everything else is the same, but Elvis is still rockin'. Like the observed rather than collapsed wavefunction of Everett's multiverse
http://en.wikipedia.org/wiki/Many-worlds_interpretation , a particular five zeroes (0,0,0,0,0) co-ordinate could be one or the other, but not both.
"Not both" is the key idea here, because it ties into concepts like quantum computing
http://en.wikipedia.org/wiki/Quantum_information and strange thought experiments like Schrodinger's Cat
http://en.wikipedia.org/wiki/Schrodinger%27s_Cat. So what would our six zeroes (0,0,0,0,0,0) co-ordinate allow us to define that our five zeroes (0,0,0,0,0) co-ordinate could not? The sixth zero would allow us to select an arbritrary co-ordinate where Elvis, like Mr. Schrodinger's cat, is simultaneously alive and dead, which is the strange world of quantum indeterminacy and quantum superposition, and what I am defining as the sixth dimension. If we were to define that as six zeroes (0,0,0,0,0,0), then five zeroes and a one (0,0,0,0,0,1) would be a part of the multiverse where some other outcome was simultaneously true: you are both a millionaire and a homeless person at the same time, for instance.
Each dimension that you add adds a piece of information that was inaccessible if you stayed within the dimension below... something that I have described in other forum entries here as the "you can't get there from here" list for whatever the current dimension you're examining might be.
This was a long answer to a short and well-phrased question. I hope I have helped to explain my thinking in a way that was useful to you, jorwat.
Thanks for writing,
Rob