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Word

derail

verb
/ˌdəˈɹeɪ.əl/

Meanings

verb

To cause a train to leave the tracks.

derail: To cause a train to leave the tracks.
verb

To interrupt or spoil a plan, process, or conversation so it cannot continue as intended.

derail: To interrupt or spoil a plan, process, or conversation so it cannot continue as intended.

Definition

To derail means to cause a train to leave its tracks or to disrupt a plan so it cannot continue normally.

Derail can mean to make a train come off its tracks, often by accident. More commonly in everyday English, it means to interrupt or ruin a plan, discussion, or project so it goes off course. It suggests a loss of control or direction. It is often used in both active and passive forms.

Examples

  • A fallen tree could derail the train if it lands on the tracks.
  • One rude comment managed to derail the whole discussion.
  • We can’t let small problems derail the project.
  • She apologized for trying to derail the meeting with unrelated questions.

Common mistake

Learners often misspell it as "derailled" instead of the correct past tense "derailed."