Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “derail”

derail

verb uk   /ˌdiːˈreɪl/ us  

derail verb (TRAIN)

[I or T] If a train derails or is derailed, it comes off the railway tracks.Accidents involving vehicles

derail verb (PLAN)

[T] to prevent a plan or process from succeeding: Renewed fighting threatens to derail the peace talks.Preventing and impedingLimiting and restricting
derailment
noun [C or U] uk   /-mənt/ us  
There's been a derailment just outside Crewe, and many people are feared dead.Accidents involving vehicles
(Definition of derail from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of derail?
Add Cambridge dictionaries to your browser to your website

Definitions of “derail” in other dictionaries

Word of the Day

microbrewery

a small company that makes beer, usually using traditional methods, and often has a restaurant where its beer is served

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More