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English definition of “collusion”

collusion

noun [U] uk   /kəˈluː.ʒən/ formal us  
agreement between people to act together secretly or illegally in order to deceive or cheat someone: It is thought that they worked in collusion with the terrorist network.
collusive
adjective uk   /-sɪv/ us  
There was evidence of collusive behaviour between the banks.
(Definition of collusion from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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