Meaning

noun a privileged class holding hereditary titles

noun the most powerful members of a society

originBorrowed from Middle French aristocratie, from Medieval Latin aristocratia, from Ancient Greek ἀριστοκρατίᾱ (aristokratíā, “the rule of the best“, that is, “the best-born”, “nobility”), from ἄριστος (áristos, “best, noblest”) + -κρατίᾱ (-kratíā), from κράτος (krátos, “power, rule”). By surface analysis, aristo- + -cracy.

Etymology from Wiktionary, CC BY-SA 3.0