from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A secret agreement between two or more parties for a fraudulent, illegal, or deceitful purpose.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A secret agreement for an illegal purpose; conspiracy.

from the GNU version of the Collaborative International Dictionary of English

  • n. A secret agreement and cooperation for a fraudulent or deceitful purpose; a playing into each other's hands; deceit; fraud; cunning.
  • n. An agreement between two or more persons to defraud a person of his rights, by the forms of law, or to obtain an object forbidden by law.

from The Century Dictionary and Cyclopedia

  • n. Secret agreement for a fraudulent or harmful purpose; a secret or crafty understanding for unworthy purposes.
  • n. Specifically, in law, a secret understanding between two or more persons to act or proceed as if adversely or at. variance with, or in apparent defiance of, one another's rights, in order to prejudice a third person or to obtain a remedy which could not as well be obtained by open concurrence.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. secret agreement
  • n. agreement on a secret plot


Middle English, from Latin collūsiō, collūsiōn-, from collūsus, past participle of collūdere, to collude; see collude.
(American Heritage® Dictionary of the English Language, Fourth Edition)
Dated from the 14th Century CE; from Old French collusion, from Latin collusionem ("act of colluding"). (Wiktionary)



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