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collision course

a course or path of a vehicle, projectile, etc., that, if unchanged, will lead to a collision with another object.
any plan, attitude, or course of action that leads to a confrontation or conflict with another.
Origin of collision course
1940-45 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for collision course
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Historical Examples
  • Shes bound on collision course for Sol, only twenty million miles out now.

    A Place in the Sun C.H. Thames
  • Instantly, the searchers moved to close in the arc and meet him on a collision course.

    The Memory of Mars Raymond F. Jones
  • If angle of closure remains constant, you're on collision course.

    First on the Moon Jeff Sutton
  • That plane steadied on a collision course and let go its wing load of rockets.

    Space Platform Murray Leinster
  • The whole shipload of them is heading on collision course for the sun.

    A Place in the Sun C.H. Thames

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