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  1. de·rail
  2. verb

    • 1. cause (a train or trolley car) to leave its tracks accidentally:

      a train was derailed after it collided with a herd of cattle
    • 2. (of a train or trolley car) accidentally leave the tracks:

      the trolley cars had a tendency to derail on sharp corners
    • 3. obstruct (a process) by diverting it from its intended course:

      the plot is seen by some as an attempt to derail the negotiations
  3. Variation

    • v.: verb: derail, 3rd person present: derails, gerund or present participle: derailing, past tense: derailed, past participle: derailed

    • verb

      cause (a train or tram) to leave its tracks accidentally:

      (of a train or tram) accidentally leave the tracks:

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