Source : Webster's Revised Unabridged Dictionary (1913)

Seminar \Sem`i*nar"\, n. [G. See {Seminary}, n.]
   A group of students engaged, under the guidance of an
   instructor, in original research in a particular line of
   study, and in the exposition of the results by theses,
   lectures, etc.; -- called also {seminary}.

Source : WordNet®

seminar
     n 1: any meeting for an exchange of ideas
     2: a course offered for a small group of advanced students