a contest of speed, e.g. in running or riding
(in pl) a meeting in which several races, esp for horses, are run
a contest or rivalry for an ultimate prize or position
a track or channel in which something rolls or slides; specif a groove for the balls in a ball bearing
a strong or rapid current of water in the sea, a river, etc
a watercourse used industrially, e.g. to turn the wheel of a mill, or the current flowing in it
archaic
a set course, e.g. of the sun or moon, or duration of time
the course of life
a narrow enclosure through which animals pass individually, e.g. to be dipped or branded