noun
A route
direction, passage, path, way; see route 1, way 2.
A prepared way, especially for racing
track, trail, ski trail, racecourse; see road 1, track 1.
A plan of study
course of study, subject, studies, curriculum, matriculation, program, specialty, major, minor, area, field, discipline; see also education 1.
A series of lessons
class, subject, classes, lectures, seminar, sessions, colloquia, required course, requirement, elective, refresher course, crash course, gut course*; see also class 3.
A way of proceeding
progression, sequence, course of action, mode of conduct; see development 2, plan 2, way 3.
as a matter of course
in due course
in the course of
of course
off course
on course