A1
a set of classes or a plan of study in a particular subject, usually a part of a program of study for a diploma, certificate, or degree
Dictionary examples:
My dog joined a barking course. (0.0)
I need a not-falling-asleep-in-class course. (0.0)
I'm in a course for eating pizza. (0.0)
a writing/math/English, etc. course (10.7)
Judy is taking an online course in medical records management. (38.3)
Mike's six-month paralegal course ends in December. (47.8)
Which course did you register for/enroll in? (52.9)