Dimension

Introduction
The official scientific definition of a Dimension is an axis of movement, such as height, length, and width.

For example, a point is 0-dimensional, a line is 1-dimensional, a plane is 2-dimensional, a cube is 3-dimensional, etc.

Time is generally considered to be the fourth dimension.

According to M-theory our multiverse is composed of 11 dimensions. According to Bosonic string theory there are 26 of them. And there are an infinite amount of dimensions within a Hilbert space.