n .
government by only a very few people 소수의 사람들에 의해서 통치되는 정권, 과두정치

• They've set up a virtual oligarchy in that country ; three men are making all decisions for twenty million people.
• Whenever Rick's parents tell him that they're in charge of the family, he tells them that he can't survive under an oligarchy.
• oligarch 는 소수의 지배자 중 어느 한 사람, 즉 독재자를 뜻한다.