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derailment

American  
[dee-reyl-muhnt] / diˈreɪl mənt /

noun

  1. the act or process of derailing.

  2. Psychiatry. loosening of associations.


Etymology

Origin of derailment

1940–45; derail + -ment, or < French déraillement

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

According to the spokesperson, the train will only be lifted off the line once the public prosecutor allows it, with investigations into the cause of the derailment still ongoing.

From Barron's Sep. 12, 2026

While no one died in the immediate aftermath of the derailment, residents allege ongoing health problems from the accident.

From The Wall Street Journal Aug. 25, 2026

He said the big concern was the issue had been reported previously, but "we still ended up with a derailment".

From BBC Aug. 20, 2026

Last Friday, Network Rail's group safety and engineering director Martin Frobisher told the BBC speed restrictions were not in place along the section of track when the derailment happened.

From BBC Aug. 19, 2026

Chances are his train was late, because in 1984 there was a fire somewhere on the New York system every day and a derailment every other week.

From "The Tipping Point" by Malcolm Gladwell

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