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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.

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 $2.65 a share.

From The Wall Street Journal • Apr. 24, 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

A fatal accident inquiry into a train derailment which killed three men in the north east of Scotland is due to begin.

From BBC • Jan. 26, 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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