Bi-dimensional space is a geometric model of the planar projection of the physical universe in which we live.The two dimensions are commonly called length and width. Both directions lie in the same plane (geometry)|plane.
In physics and mathematics, a Euclidean vector|sequence of n Real number|numbers can be understood as a point (geometry)|location in n-dimensional space. When n = 2, the set of all such locations is called 2-dimensional Euclidean space or bi-dimensional Euclidean space.
In physics, our bi-dimensional space is viewed as a planar representation of the space in which we move, described as bi-dimensional space or two-dimensional space.