/ Dictionary / Index P proseminar: Meaning and Definition of Find definitions for: pro•sem•i•nar Pronunciation: (prō-sem'u-när"), [key] — n. Educ. a course conducted in the manner of a seminar for graduate students but often open to advanced undergraduates. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. proselytize prosencephalon Related Content Daily Word Quiz: hale Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language