Chronograph/ˈkrɑːnəɡræf/ Definition 1 of 2Pro Tip 1/3Accuracy Emphasized A chronograph highlights precision in measuring small time intervals. They used a chronograph for timing each segment of the science experiment. Pro Tip 2/3Sporting Events Commonly used in sports to measure lap times or race durations accurately. The coach held a chronograph to clock the swimmers' 100-meter dash. Pro Tip 3/3Not Just Watches Chronographs can be standalone devices, not necessarily part of a watch. The laboratory's chronograph recorded reaction times down to the millisecond.