The highest socioeconomic class in a society.(noun)
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.
Use "upper class" in a sentence
"She came from Pennsylvania and she came from a very upper class family, she had been to Vasser."
"In the trilogy—Sixteen Candles (1984), The Breakfast Club (1985), Pretty in Pink (1986)—she plays a variation of the same role: the suburban everygirl (she’s middle class in the first film, upper class in the second, and “poor” in the third)."
"Remarkable shrewdness and an uncanny knack of maintaining good relations with every faction in Rome’s upper class had thus far ensured Atticus’s survival, but upon the death of Caesar the world changed so radically that he feared for both his own survival and the welfare of his daughter."