The term 'track distance' can be summarized as a measurement of the length of a track or course. The crossword solution for this term is 'LAP, ' which is a unit of measurement that is equal to the length of a track or course. A LAP is typically used to measure the distance of a race, such as a marathon or a sprint. It is also used to measure the distance of a track and field event, such as a long jump or a high jump.