A millisecond is a unit of time equal to one-thousandth of a second. It is commonly used in various fields, such as computing and telecommunications, to measure short durations. For example, a typical computer can process millions of instructions in just a few milliseconds. In everyday life, milliseconds can be crucial in activities like sports timing or video game performance. For instance, in competitive racing, a difference of just a few milliseconds can determine the winner. Understanding milliseconds helps us appreciate the speed and efficiency of modern technology and its impact on our daily experiences.