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[kuh-loo-zhuh n] /kəˈlu ʒən/
a secret agreement, especially for fraudulent or treacherous purposes; conspiracy:
Some of his employees were acting in collusion to rob him.
Law. a secret understanding between two or more persons to gain something illegally, to defraud another of his or her rights, or to appear as adversaries though in agreement:
collusion of husband and wife to obtain a divorce.
Origin of collusion
1350-1400; Middle English (< Middle French) < Latin collūsiōn- (stem of collūsiō), equivalent to collūs(us) (past participle of collūdere to collude) + -iōn- -ion
Related forms
noncollusion, noun
precollusion, noun
Can be confused
collision, collusion.
1. intrigue, connivance, complicity. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for collusion
Contemporary Examples
Historical Examples
  • Napier thought there was some collusion between the juggler and his retainer.

    Self-Help Samuel Smiles
  • Will it be said that there was any collusion between St. Paul and the Pythoness?

    The Phantom World Augustin Calmet
  • Chevrial and the Germans could not be in collusion—such an alliance was unthinkable.

    The Destroyer Burton Egbert Stevenson
  • Seek the Emperor at once before coming to me, or he may suspect us to be in collusion.

    The Minister of Evil William Le Queux
  • You did that very slyly, Rufus, but if they see you, there'll be all sorts of suspicion about collusion.

    Lords of the North A. C. Laut
British Dictionary definitions for collusion


secret agreement for a fraudulent purpose; connivance; conspiracy
a secret agreement between opponents at law in order to obtain a judicial decision for some wrongful or improper purpose
Derived Forms
collusive, adjective
Word Origin
C14: from Latin collūsiō, from collūdere to collude
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
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Word Origin and History for collusion

late 14c., from Old French collusion, from Latin collusionem (nominative collusio) "act of colluding," from colludere, from com- "together" (see com-) + ludere "to play," from ludus "game" (see ludicrous). "The notion of fraud or underhandedness is essential to collusion" [Fowler].

Online Etymology Dictionary, © 2010 Douglas Harper
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