The word "run" can mean to move quickly on foot. When someone runs, they use their legs to propel themselves forward, often for exercise or to reach a destination faster. Many people enjoy running as a way to stay fit, and it can be done alone or in groups, like during a marathon. "Run" can also refer to operating something, like a computer or a machine. When you run a program on your computer, you are telling it to start working. This usage shows how versatile the word is, as it applies to both physical movement and the functioning of technology.