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collision course

noun
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.
Origin of collision course
1940-1945
1940-45
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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11
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