Dimensions are the measurable extents of an object or space, typically described in terms of length, width, and height. In everyday life, we often think of dimensions when considering the size of a room or a piece of furniture. For example, a table might have dimensions of 4 feet long, 2 feet wide, and 3 feet high, helping us understand how it will fit in a space. In mathematics and physics, dimensions can also refer to more abstract concepts, such as time or additional spatial dimensions beyond the three we commonly perceive. The idea of higher dimensions is often explored in theories like string theory, which suggests that there could be more than the three spatial dimensions we experience.