Surface

A surface refers to the outermost boundary of an object or material, where it interacts with its environment. It can be smooth or rough and determines how the object looks, feels, and behaves. Surfaces can be natural, like the skin of a fruit, or man-made, such as the coating of a tablet. They are important in various fields because they influence properties like friction, adhesion, and reflection. Essentially, a surface is what we perceive and interact with at the boundary between something and its surroundings.