here is one possible definition: a frame of reference, constructed upon an invisible line stretched between poles of contrast. used for mental quantification of phenomena.
One such dimension, heretofore unnoticed and thus unconsciously left unexplored by yours truly, is the intensity of focus from the strenuous pinpointing of the absolutely specific to the agoraphobic openness of utter relaxation. Swinging to and fro on the scale suspended between these two opposites seems to have a direct and dramatic effect on my perception.