The "Short-Run" in economics refers to a period during which at least one factor of production is fixed, meaning it cannot be changed. For example, a factory may have a set number of machines that cannot be increased immediately. During this time, businesses can adjust other inputs, like labor, to respond to changes in demand. In the short run, firms can experience varying levels of output and profitability. They may increase production by hiring more workers or using existing resources more efficiently. However, long-term adjustments, such as expanding facilities or investing in new technology, require a different time frame, known as the Long-Run.