"Upper" can refer to something that is situated higher or above another object. For example, in a building, the upper floors are those located above the ground level. In clothing, an upper can refer to the part of a shoe that covers the top of the foot. In anatomy, "upper" often describes body parts located towards the head or above the waist, such as the upper arm or upper back. In a broader context, "upper" can also denote a higher social or economic class, as in the term upper class, which refers to individuals with significant wealth and influence.