The three-dimensional spaces of our universe are commonly referred to as "space" or "spatial dimensions." These dimensions are often denoted as length, width, and height, or alternatively as x, y, and z coordinates in Cartesian coordinates.
In physics and mathematics, these three spatial dimensions are used to describe the extent and position of objects in our universe. They provide a framework for locating and measuring the position, size, and shape of physical objects and phenomena.
It's important to note that the concept of dimensions extends beyond our three-dimensional space. In addition to the three spatial dimensions, we also have one dimension of time, which together make up the four-dimensional spacetime in which we live and experience the world. This four-dimensional spacetime is often described using the mathematical framework of Minkowski spacetime, combining the three spatial dimensions with the dimension of time.
However, it's worth mentioning that various theories, as discussed earlier, propose the existence of additional spatial dimensions beyond the three dimensions we commonly experience. These theories suggest that our universe may have more dimensions, but these additional dimensions are thought to be compactified or hidden at scales much smaller than we can currently observe.