The term "end dimension" refers to the final stage or limit of a particular dimension in a mathematical or physical context. In geometry, dimensions are often described as the measurable extents of an object, such as length, width, and height. The end dimension signifies the point at which these measurements conclude or reach their maximum capacity. In the context of theoretical physics, particularly in string theory, the end dimension can also relate to the additional dimensions beyond the familiar three-dimensional space. These extra dimensions may be compactified or hidden, influencing the fundamental properties of the universe, including the behavior of particles and forces, as described by string theory.