There are the common dimensions that we deal with every day. We know them as “3D” or length, width, and breadth and most add a forth dimension time. There have been many debates about whether time is a dimension or not. To judge whether time is a dimension or not, we must first set some criteria for our definition of a dimension.
True dimensions are interchangeable, length is interchangeable with height and width. All that needs to be done is change the orientation and there you have another length. No matter what orientation is chosen time does not change into length.
Dimensions can be measured often, repeatedly if desired. We can measure time, but once we have measured an event we cannot measure the same event again. For example, we can measure the length of a yard stick repeatedly, but we cannot measure the length of time of an Olympic race but once. We can run the race again, but for any given race we can only measure it once. Of course we can make a film or video recording of the event, but we would then be measuring the length of the recording on a tape, not the event itself.
Dimensions have a connection with one another. Our 3D world meets at right angles with one another and at any given point contacts or intersects each of the other dimensions. Time coexists with 3D, but 3D is oblivious to time. Nowhere can time be found to intersect or to meet with 3D.
Dimensions can be traveled in, forward, and back. There is no place in 3D that we can go, travel, or stand still (under normal circumstances ) that influences time. Try as we may, time has proven itself impossible to travel forward and backward in. There is no way to travel in time the same way we travel in 3D. Time treads on oblivious to what is going on in 3D.
Given these definitions of a dimension, time looses out.
