Definition, Meaning & Synonyms

derailer

noun

/dɪˈreɪlər/

Definition

A device used to prevent a train from going off the tracks.

Examples

The derailer was activated, successfully preventing the train from entering a dangerous curve.
In the meeting, she acted as a derailer by constantly bringing up irrelevant topics, disrupting the flow of discussion.

Meaning

In its most common reference, a derailer is a safety mechanism installed on railroad tracks that causes a train to veer off track to prevent accidents or derailments. In a broader context, it can refer to something that interrupts progress or stability, especially in a project or plan.