British undergraduate degree classification
In the United Kingdom, medicine is usually taught as an undergraduate course, with graduates being awarded a master's level qualification: normally the conjoined degrees of Bachelor of Medicine, Bachelor of Surgery (MBBS, BM BCh, MB ChB, etc.) although at Queen's University Belfast (and universities in Ireland) Bachelor in the Art of Obstetrics (BAO) is added, and at some universities only the Bachelor of Medicine is awarded - all of these have equal standing. Unlike most undergraduate degrees, the MBBS is not normally considered an honours degree, and thus is not classified into first class honours, etc. Students may be awarded "Merits" and "Distinctions" for parts of the course or the whole course (depending on the institution) and "Honours" may be awarded at some institutions for exceptional performance throughout the course (as a grade above Distinction).
Honors student
A third meaning is a postgraduate "with Honours" or "cum honored" degree, which is (part of) an academic degree itself, e.g. the one-year Bachelor with Honours degree in Australia, the one-year Baccalaureatus Cum Honore degree in Canada or the four-year integrated Master with Honours degree in Scotland. Postgraduate Honours degree programs generally involve completion of master's level courses and the submission of a long high-research thesis.