◊ Two people or things that are on a collision course are moving and will crash into each other if one of them doesn't change direction.朝着可能会碰撞的方向移动;有相撞的趋势
The two airplanes were on a collision course.这两架飞机当时正朝着可能相撞的方向飞行。
The comet was on a collision course with the planet.那颗彗星有可能与这颗行星相撞。
— often used figuratively常用作比喻
The government's policies are putting us on a collision course with economic disaster.政府的这些政策将会引发经济灾难。