Meaning of “derail” in the English Dictionary

(Definition of “derail” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"derail" in American English

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derailverb [ T ]

us /dɪˈreɪl, di-/

to cause a train to run off the tracks:

fig. Renewed fighting threatens to derail the peace talks (= stop them from continuing).

(Definition of “derail” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"derail" in Business English

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derailverb [ T ]

uk /dɪˈreɪl/ us

to stop something from succeeding:

Investors are very concerned that a new crisis could derail the economic recovery.
Analysts identified five factors which could derail the hi-tech markets

(Definition of “derail” from the Cambridge Business English Dictionary © Cambridge University Press)