/ Dictionary / Index U upperclassman: Meaning and Definition of Find definitions for: up•per•class•man Pronunciation: (up'ur-klas'mun, -kläs'-), [key] — pl. -men. a junior or senior in a secondary school or college. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. upper class upper crust Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language