n. someone who rules by virtue of his or her wealth.
the GNU version of the Collaborative International Dictionary of English
n. One whose wealth gives him power or influence; one of the plutocracy.
The Century Dictionary and Cyclopedia
n. One who rules or sways a community or society by virtue of his wealth; a person possessing power or influence solely or mainly on account of his riches: a member of a plutocracy.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. someone who exercises power by virtue of wealth
Word Usage
"Every movement of a United States plutocrat is recorded in the leading papers; every detail of his daughter's courtship and of her quarrels with her lover is described."