The phrase "uneven surfaces" refers to a surface that is not level or flat, but rather has areas that are higher or lower than others. This could refer to any type of surface, such as pavement, ground, stairs, or even flooring in a building. The term can also be used more broadly to describe other types of surfaces where the height and shape vary irregularly, such as rocky terrain or an unevenly shaped piece of wood. In general, "uneven surfaces" refers to any surface that is not smooth or consistent, posing potential challenges for those navigating on it.