From Longman Dictionary of Contemporary Englishprep schoolˈprep school noun [countable, uncountable] informalSES a preparatory school
Examples from the Corpus
prep school• Q Our son is 11 years old and attends a prep school as a boarder.• He brought a prep school curriculum to Mercy High.• In a prep school match, a score of 32 rates with a Test century.• This was a prep school now.• From what Louise told her, this was a middle-income prep school, not one of the gilded establishments.• The best students, who attended one of the few selective schools, received the equivalent of a high-quality prep school education.• Those shy prep school guys at mixers with their endearing long hands and blushing complexions, I could make them laugh.Origin prep school (1800-1900) preparatory school 