Definitions

1. adjective

characterized by or favoring traditional and conservative dress and manners, especially in a way considered typical of privileged upper-class youth in the United States

“The preppy student wore a polo shirt and khaki pants to school.”

2. noun

a person who is characterized by or favoring traditional and conservative dress and manners, especially in a way considered typical of privileged upper-class youth in the United States

“The preppies in the school clique were known for their expensive clothing and accessories.”