/ pluːˈtɒkrəsi; NAmE -ˈtɑːk-/ noun ( pl. -ies )
1.
[ U ] government by the richest people of a country
2.
[ C ] a country governed by the richest people in it
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WORD ORIGIN
mid 17th cent.: from Greek ploutokratia , from ploutos wealth + kratos strength, authority.