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Cosa Nostra

[koh-zuh nohs-truh]
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noun
  1. a secret association engaged in organized crime in the U.S., modeled after and affiliated with the Mafia.
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Origin of Cosa Nostra

1960–65; < Italian: literally, our affair
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for cosa nostra

Cosa Nostra

noun
  1. the branch of the Mafia that operates in the US
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Word Origin

Italian, literally: our thing
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for cosa nostra

1963, "the Mafia in America," from Italian, literally "this thing of ours."

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Online Etymology Dictionary, © 2010 Douglas Harper