Course  —n. 1 onward movement or progression. 2 direction taken (changed course). 3 stretch of land or water for races; golf-course. 4 series of lessons etc. In a particular subject. 5 each successive part of a meal. 6 sequence of medical treatment etc. 7 line of conduct. 8 continuous horizontal layer of masonry, brick, etc. 9 channel in which water flows. —v. (-sing) 1 (esp. Of liquid) run, esp. Fast. 2 (also absol.) Use hounds to hunt (esp. Hares).  in course of in the process of. In the course of during. Of course naturally; as is or was to be expected; admittedly. [latin cursus: related to *courier]