- the period in the U.S. c1870–98, characterized by a greatly expanding economy and the emergence of plutocratic influences in government and society.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
in reference to an era in U.S. history, from the novel "The Gilded Age" by Mark Twain and C.D. Warner, published 1873.
Online Etymology Dictionary, © 2010 Douglas Harper