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derailment

American  
[dee-rayl-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:

The agency has said it collected over 28,000 air samples and found no ongoing exposure in the East Palestine community from contaminants released by the derailment and subsequent cleanup.

From The Wall Street Journal ● Sep. 23, 2026

The fiery derailment in East Palestine led to one of the worst U.S. chemical disasters in recent years.

From The Wall Street Journal ● Sep. 23, 2026

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

The body filed a legal claim earlier this month against DB Cargo UK and Touax Rail over the derailment near Llangennech, Carmarthenshire, in August 2020.

From BBC ● Aug. 24, 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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