Definition of collusion in English:


Syllabification: col·lu·sion
Pronunciation: /kəˈlo͞oZHən


  • 1Secret or illegal cooperation or conspiracy, especially in order to cheat or deceive others: the armed forces were working in collusion with drug traffickers collusion between media owners and political leaders
    More example sentences
    • Competition between elites is too easily turned into collusion between plunderers.
    • If discrimination is not challenged then we are effectively in collusion with the perpetrators of such behaviour.
    • But experience has shown that this kind of cooperation often leads to collusion between the two sides.
    conspiracy, connivance, complicity, intrigue, plotting, secret understanding, collaboration, scheming
  • 1.1 Law Illegal cooperation or conspiracy, especially between ostensible opponents in a lawsuit.
    More example sentences
    • As to the possibility of collusion, the judge provided a specific example.
    • If a trial judge makes an affirmative finding of collusion, then the petition for divorce must be refused.
    • There is no suggestion that the evidence of the three witnesses is tainted with collusion.



Pronunciation: /-siv, -ziv/
More example sentences
  • ‘Regardless of how trivial they may be, corrupt, collusive and nepotistic practices will transgress public trust and at the same time violate one's official oath,’ she said.
  • It is also expected to effectively reduce to a minimum corrupt and collusive practices in the bureaucracy,’ he said.
  • Under competition law, the industry guidelines would be unlawful as a collusive agreement among competitors unless the ACCC authorises it due to ‘public benefit’.


Pronunciation: /-sivlē, -zivlē/
More example sentences
  • In the case of minibuses, different individual taxi associations appear to decide collusively on taxi fares to be charged per route, outside consultation with, or interference by, the authorities.
  • Nor can the police act collusively by supplying information to assist those committing wrongful acts or by encouraging them to commit wrongful acts.
  • For example, the Collusive Practices Act 1965 makes it an offence to collusively tender for government contracts or bid collusively at certain auctions in Victoria.


late Middle English: from Latin collusion-, from colludere 'have a secret agreement' (see collude).

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