The 4th Dimension physical or meta physics?

Just like in the third dimension you can see through the illusions of the second dimension (like a sphere on 2d flat land, to them it's impossible to pass, to you you can just step over it). In the 4th dimension you can see through the illusions of third dimensional reality. You can manipulate, pass through matter. Time is non linear, as you live in the moment and understand that all ideas of past and future exist simultaneously and are simply different aspects, different points of view of the same NOW moment.

Understand, a being does never "go" to a higher dimension, he becomes aware that he is the dimension and once he understands the illusions of the dimension he previously thought he existed in, THEN, he, using the terminology for the sake of conveying the information, "enters" the higher dimension. You will know that your awareness is in 4th dimensional reality when you truly, logically, emotionally, experientially realize the illusion of third dimension. Then you will be in such a state of knowingness that you simply cannot fluctuate back to that state of awareness.

The journey from lower dimensions to higher dimensions is simply a journey towards becoming fully aware of the multi-dimensional reality complex that you, not exist in, but actually ARE.

This is just my perspective anyway.

This question actually depends on what you mean by 'dimension'. Kilogram is a dimension, as is celsius and a myriad of other quantities, if you're using the word to define properties of something. Apple in terms of (weight, temperature, volume) is a 3 dimensional quantity. Add in color for 4d.

Dimension can also refer to a coordinate system. (x,y,z). That's 3 dimensions in spatial coordinates. If you tell a friend where to meet you, you won't just give them 3 d coordinates though, because they won't know when to meet you. So you say meet me at x,y,z at time t, (x,y,z,t). A 4 dimensional quantity has been created by specifying when, which is what people usually mean when they say 'time is the fourth dimension.'

Then of course there is the non physical meaning that you seemed to be seeking. In that sense, the Earth is a torus with a large radius of 1 astronomical unit and a small radius of 1 Earth radius. You, on the other hand, are an unbroken blur emerging from your mother when you were born and growing out of yourself as you read this/pass into the future. In other words, a four dimensional object is a 3 dimensional object stretched through time.

Of course, if a word can be defined in as many ways as this you may as well just define it to mean what you want. The only people who get confused by it are those who know what it should mean in the first place and no one else is really interested in semantics that much in the first place.

Except people like me I guess.