Fourth dimension

The fourth dimension typically refers to time as an additional dimension beyond the three spatial dimensions (length, width, height). In physics, particularly in Einstein's theory of relativity, space and time are interconnected in a four-dimensional spacetime continuum. This means that events are described not just by their position in space, but also by when they occur. While we perceive the world in three dimensions, considering time as a fourth dimension helps explain motion, gravity, and the behavior of objects in the universe more comprehensively.