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zillionaire

[zil-yuh-nair] /ˌzɪl yəˈnɛər/
noun, Informal.
1.
a person of incalculably great wealth.
Origin of zillionaire
1945-1950
1945-50; zillion + (million)aire
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Slang definitions & phrases for zillionaire

zillionaire

noun

An enormously rich person; a super-tycoon: and Larry Dunlap will become an instant zillionaire/ his earlier piece about how the Hong Kong zillionaires are buying up San Francisco (1940+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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