"Dilated" refers to the process of something becoming wider or larger. This term is often used in medical contexts, such as when discussing the pupils of the eyes. When light enters the eye, the pupils can dilate to allow more light in, which helps improve vision in low-light conditions. In addition to its use in medicine, "dilated" can describe physical objects or spaces that have expanded. For example, a balloon that is filled with air becomes dilated as it stretches and increases in size. This concept can also apply to various materials that expand when heated or subjected to pressure.