on a collision course

idiom

: 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.

Examples of on a collision course in a Sentence

Recent Examples on the Web

The keyhole is an area in space where the gravity of a planet, like Jupiter, could change the asteroid's altered trajectory once more — potentially putting it on a collision course with our planet. —Elizabeth Howell, Space.com, 10 Sep. 2025

Set during the Great Depression, a Milwaukee detective’s quest to find a Wisconsin cheese heiress lands him in Hungary and on a collision course with history to meet Nazis, spies, and swing musicians in the octogenarian literary giant’s first novel in over a decade. —Tomi Obaro, Vulture, 9 Sep. 2025

The system gives pilots two aural alerts when an unauthorized aircraft enters the runway on a collision course with the authorized aircraft. —Asher Redd, FOXNews.com, 1 Sep. 2025

The Royals and Mariners remain on a collision course. —Kansas City Star, 31 Aug. 2025

Rhymes for on a collision course

• bourse
• coarse
• force
• gorse
• hoarse
• horse
• norse
• source
• concourse
• divorce
• endorse
• enforce