Definition of "aristocrat"
A proponent of aristocracy; an advocate of aristocratic government.
Quotations
Professor Fite, in The Platonic Legend, deprecates earlier idealization, and finds Plato to be an aristocrat, something of a snob, and the advocate of a restrictively organized society. / […] / Plato was, as has so often been observed, temperamentally an aristocrat. And he believed that the qualities needed in his rulers were, in general, hereditary, and that given knowledge and opportunity you could deliberately breed for them.
1974: Plato (author) and Desmond Lee (translator), The Republic (2nd edition, revised; Penguin Classics; Translator’s Introduction, pages 51 and 53