Can a dimension exist that is neither temporal nor spatial?

[Dremmer]

Is it possible?

 

[haruspex]

Yes, and there are many instances. A system is often described as moving in a "state space". That ascribes dimensions to all sorts of characteristics, such as speed, potential energy, temperature... whatever you like.

 

[cosmik debris]

The number of dimensions used to describe spaces is the minimum number of independent co-ordinates needed to specify a point in that space. The co-ordinates may be any units you choose.

 

[gonegahgah]

Could reaction (aka acceleration) be considered to be a dimension. Things don't just move through time and space; they also react to each other?