Meaning of collision course

colli'sion course"

Pronunciation: [key]
  1. a course or path of a vehicle, projectile, etc., that, if unchanged, will lead to a collision with another object.
  2. any plan, attitude, or course of action that leads to a confrontation or conflict with another.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.