Collusion :: Collusion (n.) A secret agreement and cooperation for a fraudulent or deceitful purpose; a playing into each other's hands; deceit; fraud; cunning.
Collusion :: Collusion (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..
Collusive :: Collusive (a.) Characterized by collusion; done or planned in collusion.