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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:

Stripping out one-time costs, such as expenses related to its tie-up with Union Pacific and continued costs from its freight-train derailment in Ohio, earnings were $3.52 a share in the second quarter.

From The Wall Street Journal Jul. 23, 2026

Following the derailment at Selhurst and the signal failure at London Blackfriars and Norwood Junction, GTR took the decision to issue a "do not travel" alert.

From BBC Feb. 4, 2026

Stripping out certain one-time items, such as expenses related to its tie-up with Union Pacific and continued costs from its freight-train derailment in Ohio, earnings were $3.22 a share.

From The Wall Street Journal Jan. 29, 2026

The working theory for investigators is that a crack in one of the rails might have caused a derailment.

From Barron's Jan. 25, 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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