A competition between runners, horses, vehicles, boats, etc., to see which is the fastest in covering a set course. A strong or rapid current flowing through a narrow channel in the sea or a river. A groove, channel, or passage, in particular. Each of the major divisions of humankind, having distinct physical characteristics. Compete with another or others to see who is fastest at covering a set course or achieving an objective. Move or progress swiftly or at full speed.