A course or series of lectures: a unit of instruction on a particular subject (university courses, community classes, online courses).
今学期は経済学の講座を履修する予定だ。
I'm planning to take an economics course this semester.
市役所が主催する英会話講座に申し込んだ。
I signed up for the English conversation course run by the city office.
人気のオンライン講座は申し込みが早く埋まる。
Popular online courses fill up quickly.
An academic unit within a university (a chair or department unit): the division to which professors and lecturers belong, responsible for teaching and research.
彼は工学部の電気システム講座の教授だ。
He is a professor in the Electrical Systems chair of the engineering faculty.
研究講座が新しく設置された。
A new research chair has been established.