Dimensional travel refers to the concept of moving between different dimensions or realities. In theoretical physics, dimensions can be understood as different aspects of the universe, such as time, space, and alternate realities. This idea is often explored in science fiction, where characters might use advanced technology or special abilities to navigate through these various dimensions. Theories like string theory suggest the existence of multiple dimensions beyond the familiar three-dimensional space. While dimensional travel remains a speculative concept, it raises intriguing questions about the nature of reality and the possibilities of existence beyond our own universe.