derail

verb

de·​rail di-ˈrāl How to pronounce derail (audio)
dē-
derailed; derailing; derails

transitive verb

1
: to cause to run off the rails
2
a
: to obstruct the progress of : frustrate
security problems derailed the tour
b
: to upset the stability or composure of
divorce … can seriously derail an employeeJoanne Gordon

intransitive verb

: to leave the rails
derailment noun

Examples of derail in a Sentence

The train derailed in heavy snow. The train was derailed by heavy snow.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Prior to May, Vegas was a journeyman in the later days of a career highlighted by four PGA Tour wins, but often derailed by injuries and hard times. Brendan Quinn, New York Times, 15 June 2025 The production — directed and choreographed by Jennifer Werner — stands on the shoulders of a strong cast, led by Sam McLellan as Elder Price, the strait-laced, big brother type who’s on a mission to fulfill his, well, mission but is derailed by self-doubt and religious questioning. Michael James Rocha, San Diego Union-Tribune, 12 June 2025 If executed across a comprehensive set of key targets, America’s ability to competently fight could be derailed at the opening of a conflict. David A. Deptula, Forbes.com, 12 June 2025 Despite Anna’s meticulous preparations, her intent to force confessions from the passengers and deliver them directly to authorities is immediately derailed when just hours into the trip one of her guests is murdered. Lexy Perez, HollywoodReporter, 10 June 2025 See All Example Sentences for derail

Word History

Etymology

French dérailler to throw off the track, from dé- de- + rail, from English

First Known Use

1850, in the meaning defined at transitive sense 1

Time Traveler
The first known use of derail was in 1850

Browse Nearby Words

Cite this Entry

“Derail.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/derail. Accessed 18 Jun. 2025.

Kids Definition

derail

verb
de·​rail di-ˈrā(ə)l How to pronounce derail (audio)
: to cause to run off the rails
a train derailed by heavy snow
derailment noun

More from Merriam-Webster on derail

Last Updated: - Updated example sentences
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