col·lu·sion 
/kəˈlu:ʒən/ noun
/kəˈlu:ʒən/ noun [noncount] : secret cooperation for an illegal or dishonest purpose
▪ The company was acting in collusion with manufacturers to inflate prices. — often + between ▪ She uncovered collusion between city officials and certain local businesses.
▪ The company was acting in collusion with manufacturers to inflate prices. — often + between ▪ She uncovered collusion between city officials and certain local businesses.
