The term "687th" refers to the ordinal number that comes after 686 and before 688. It is used to indicate a position in a sequence, such as ranking, listing, or ordering. For example, in a race, the runner who finishes in 687th place is the 687th person to cross the finish line. In various contexts, "687th" can be applied to different subjects, such as the 687th day of a specific event or the 687th entry in a database. It can also refer to the 687th element in a series, like a list of achievements or milestones, providing a way to categorize and reference items systematically.