Informal A student or former student of a preparatory school.
Informal A person whose manner and dress are deemed typical of traditional preparatory schools.
Of or relating to a preppy or a preparatory school.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.