Noun
A member of an oligarchy; one of the rulers in an oligarchical government.
Source: Webster's dictionaryBoth oligarch and tyrant mistrust the people, and therefore deprive them of their arms. Aristotle
Be assured, fellow citizens, that in a democracy it is the laws that guard the person of the citizen and the constitution of the state, whereas the despot and the oligarch find their protection in suspicion and in armed guards. Aeschines
The method of rule of the tyrant and the oligarch is quite simply to clobber, coerce, or overawe all or most other groups in the interest of their own. Bernard Crick
If I still lived in Russia, I'd be dead... or a really effective oligarch. Gary Shteyngart
I am not an oligarch. I am a servant and I try to align my interests and those of my investors. Yuri Milner
As my colleague Damon Linker argues, Bloomberg is without question a Russia-style oligarch whose campaign is "an expression of highly developed rot at the core of the American political system." Source: Internet