The Open Dictionary

derailment

noun

UK/ˌdiːˈreɪl.mənt/
US/ˌdiːˈreɪl.mənt/

Definitions of derailment noun

  1. CountableUncountable

    The act or instance of a train leaving its tracks.

    • Several train services were delayed due to the derailment.

    • Local residents witnessed the train derailment.

    • The railway company is investigating the cause of the recent derailment.