Almost everything what we are speaking about in physics, in math, in religion, ... is related to "dimensions". It's an essential concept. Dimensions are although used in several ways creating thus confusion. Do we have to create new definitions for the different use? Webster: Main Entry: 1di·men·sion Function: noun Etymology: Middle English, from Middle French, from Latin dimension-, dimensio, from dimetiri to measure out, from dis- + metiri to measure -- more at MEASURE Date: 14th century 1 a (1) : measure in one direction; specifically : one of three coordinates determining a position in space or four coordinates determining a position in space and time (2) : one of a group of properties whose number is necessary and sufficient to determine uniquely each element of a system of usually mathematical entities (as an aggregate of points in real or abstract space) <the surface of a sphere has two dimensions>; also : a parameter or coordinate variable assigned to such a property <the three dimensions of momentum> (3) : the number of elements in a basis of a vector space b : the quality of spatial extension : MAGNITUDE, SIZE c : a lifelike or realistic quality d : the range over which or the degree to which something extends : SCOPE -- usually used in plural e : one of the elements or factors making up a complete personality or entity : ASPECT 2 obsolete : bodily form or proportions 3 : any of the fundamental units (as of mass, length, or time) on which a derived unit is based; also : the power of such a unit 4 : wood or stone cut to pieces of specified size 5 : a level of existence or consciousness I want to invite you to read an article of Michio Kaku: HyperSpace : A Scientific Odyssey, that you can find (in link articles) on entering the http://www.mkaku.org, : (quote)"To see how higher dimensions helps to unify the laws of nature, physicists use the mathematical device called "field theory.... In other words, by adding the fifth dimension, we have trivially unified light with gravity. In other words, light is now viewed as vibrations in the fifth dimension. In five dimensions, there is "enough room" to unify both gravity and light." In math's and physics "dimensions" are just added like if we were God. Then we try to explain interrelationships to explain concepts like the Calabi-Yau spaces. But isn't this LAYERING? Dimensions represent also our daily physical world (related to "perspective"). But there are a lot of questions, such as: are dimensions 'isolated'. Isolation seems logic since we are unable to observe higher dimensions. But also does it make sense to call TIME a dimension? Isn't it adding apples to oranges? Isn't time a quality (progress) of the physical processes? Can't we explain space-time in another way? Are we trapped in word games? Do we have to rephrase?