The collusion of the truck drivers to secretly change the speed limit signs on the highway almost resulted in disastrous collisions during the heavy rain storm.2. An agreement or understanding for purposes of trickery or fraud: The extent of collusion to which Jeff, the farmer, did to fool his neighbor into giving him pasture land was astonishing.
3. A secret agreement or working together for what is typically an illegal purpose: When the oil well failed, the operators suspected a collusion between the teams of workmen.
The reporter revealed the collusion between some city officials and certain local businesses to keep the commercial taxes low.4. Etymology: from Old French collusion; from Latin collusionem, "act of colluding"; from colludere, from com-, "together" + ludere, "to play"; from ludus "game".