COLLISION

[noun] [C]There has been a collision involving a number of cars on the main road into town. [C]Two drivers were killed in a head-on (= direct) collision between a car and a taxi last night. [C]Two trains were in collision at the station. [U]The cyclist was in collision with a bus. [U]The cars came into collision at the traffic lights. [U](figurative) There was a collision of interests/opinions/principles.If two or more people or organizations are on a collision course there will probably soon be a fierce disagreement.The director and his staff are on a collision course.