From Longman Dictionary of Contemporary Englishcollusioncol‧lu‧sion /kəˈluːʒən/ noun [uncountable] SCLa secret agreement that two or more people make in order to do something dishonest
Examples from the Corpus
collusion• Collusion at the company breeds collusion in the family, which breeds collusion at the company-his and hers.• A sense of complicity is established between the artist and the single viewer, a collusion excluding all other visitors.• The manufacturers of tea and soap are in collusion.• In fact, the church will be in collusion with evil if it does not stand on the side of the victim.• But he only looked at her blankly, and gave no rueful half-smile in collusion.• Chandler convicts himself of collusion as well: the novel focuses on the profits the Sternwoods have made in oil.• This then ensures that fraud can not be committed without the collusion of at least two individuals.From Longman Business Dictionarycollusioncol‧lu‧sion /kəˈluːʒən/ noun [uncountable] when people or businesses share information or secretly make arrangements among themselves to get an unfair advantagean investigation into alleged collusion among art dealersThe Wall Street Journal reported last month that collusion and price-fixing in the Treasury market have been routine for more than a decade. 