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a small group of students, as in a university, engaged in advanced study and original research under a professor or the like. 2. the gathering place of such a group. 3. a course or subject of study for advanced graduate students. 4. a meeting of students, usually at an advanced level, for discussion of and instruction in a specified topic, usually chaired by a teacher. 5. a meeting organised to discuss a specific topic: a public seminar on uranium mining.