on a collision course

1. Used other than figuratively or idiomatically: see on,‎ a,‎ collision course.
2. (figurative, by extension) (typically with with) Dangerously and imminently approaching (a negative condition, result, etc.).

   The government is putting us on a collision course with nuclear disaster.

   • 2025 June 26, Kasra Naji, “When Iran's supreme leader emerges from hiding he will find a very different nation”, in BBC‎^[1]:

     A vast number of Iranians will singularly hold Ayatollah Khamenei, who first became leader in 1989, responsible for setting Iran on a collision course with Israel and the US that ultimately brought considerable ruin to his country and people.

• “on a collision course”, in Lexico, Dictionary.com; Oxford University Press, 2019–2022.
• “on a collision course”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.
• “be on a collision course”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present.
• “on a collision course”, in Collins English Dictionary.