I kind of think of a dimension more as an aspect of existence than a direction. But, thats just me. I loved the answer from AJB. "In what sense?" My answer to that is "nonsense" perhaps. I have done quite alot of systems analysis over the years and you have to understand that in order for me to see systems, I have to find a way to frame them in my mind. That being said, and as you know, there are many similarities among electrical, hydraulic and pneumatic systems. But, sometimes I think about the things you physics types ponder and wonder if there is a system at work here too. I asked if dark energy and dark matter could be just two dimensional because it seems more logical, given what I've read, that Time might be more like a wave of forces and charges passing over a two dimensional surface such as dark energy, raising it for an instant to three dimensions and then leaving two dimensional dark matter as a result. That wave might not be any wider that the life of a Higgs, but it could be 14 or 15 billion years wide and stretching. Please understand that I do not claim to be a scientist at all, but just wondering what you guys think about that possibility.
Sorry, I meant 14 or 15 billion years long, not wide.