Four Hundred
or 400
noun
the exclusive social set of a city or area.
Origin of Four Hundred
An Americanism dating back to 1885–90; allegedly after the capacity of the ballroom in the mansion of Caroline Schermerhorn Astor, a leader of New York society in the late 19th century
Example sentences from the Web for four hundred
British Dictionary definitions for four hundred
Four Hundred
noun
the Four Hundred US
the most exclusive or affluent social clique in a particular place