Longman Dictionary of Contemporary English homepage

Topic: TRAINS, RAILWAYS

Date: 1800-1900
Language: French
Origin: dérailler, from English rail

derail

 verb
     
de‧rail
1 [intransitive and transitive]TTT if a train derails or something derails it, it goes off the tracks
2 [transitive] to spoil or interrupt a plan, agreement etc:
a mistake that might derail the negotiations
—derailment noun [uncountable and countable]
Definition of derail from the Longman Dictionary of Contemporary English within
the topic TRAINS, RAILWAYS
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