Dictionary

derail

verb de·rail \di-ˈrāl, dē-\

of a train : to leave its tracks

: to cause (a train) to leave its tracks

Full Definition of DERAIL

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 employee — Joanne Gordon>
intransitive verb
:  to leave the rails
de·rail·ment \-mənt\ noun
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Examples of DERAIL

  1. The train derailed in heavy snow.
  2. The train was derailed by heavy snow.

Origin of DERAIL

French dérailler to throw off the track, from dé- de- + rail, from English
First Known Use: 1850
DERAILMENT Defined for Kids

derail

verb de·rail \di-ˈrāl\
de·railedde·rail·ing

Definition of DERAIL for Kids

1
:  to leave or cause to leave the rails <The train derailed.>
2
:  to make progress or success difficult for <Injuries derailed his plan for a championship.>

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