coursecoursecoursescoursedcoursingnoun1(pluralcourses) a set of lessons on a certain subject: He's taking a course in computer programming.2(no plural) the direction that something moves in: We followed the course of the river. The plane had to change course because of the storm.3(no plural) the time when something is happening: The telephone rang six times during the course of the evening.4(pluralcourses) one separate part of a meal: a three-course meal I had chicken for my main course.5(pluralcourses) a piece of ground for some kinds of sport: a golf coursea racecourseof coursecertainly: Of course I'll help you. ‘Can I use your telephone?’ ‘Of course you can.’ ‘Are you angry with me?’ ‘Of course not!’