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Difference between Collision course and Crash course

collision course

1. a course, as of moving vehicles, that will end in a collision if left unchanged:

  • Because of the density of the fog, the deck officers did not realize that the ships were now on a collision course.

2. confrontation between opposing groups, etc. that may end in conflict:

  • All attempts at diplomacy have broken down and the two states now appear to be on a collision course.

crash coursea short intensive course in which one is taught the most important facts and skills:

  • Well, the powers that be stipulate that all teachers be computer literate. So I took a crash course in computers…