- #1

My confusion is as follows:

I know "time" is often called THE FOURTH DIMENSION. Is this because one working definition for a dimension is a way to define a position? For example: "A" exists at x, y, z coordinates WHEN -- and then a time is given without which the location could fall short of indicating position (unless object "A" somehow exists from the beginning of time for all eternity, that is the only exception I can think of where time is not required to pinpoint location...but even then perhaps. .. .

Part of my confusion in understanding how the term dimension is defined is a result of what I have heard about string theory in which it is suggested that if string theory has any validity it requires 32 dimensions. Are these dimensions an extension of the tesseract, going with the idea that each higher dimension is generated by extending the previous dimensions corners into right angles to itself? But then if this is so, how does time come under the definition of a fourth dimension?

If string theory requires 32 dimensions, and having 32 dimensions is something considered, than even if the fourth dimension is time, how does one define the fifth dimension?