/ Dictionary / Index P preparatory school: Meaning and Definition of Find definitions for: prepar'atory school" Pronunciation: [key] a private or parochial secondary school, esp. one boarding its students and providing a college-preparatory education. a private elementary school, esp. one preparing its students for public school. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. preparatory prepare Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language