on a collision course

idiom

Definition of on a collision course

: moving so as to crash into each other if one or the other does not change direction The two airplanes were on a collision course. often + with The comet was on a collision course with the planet. often used figuratively The government's policies are putting us on a collision course with economic disaster.

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ON

Ona

on about

on a collision course

on a dare

on a day-to-day basis

on a diagonal

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