Third-person singular simple present indicative form of derail

Synonym of derailer: A device placed on railway tracks in order to cause a train to derail. / An instance of diverting a conversation or debate from its original topic.

(transitive) To cause to come off the tracks. / (intransitive) To come off the tracks. / (intransitive, figuratively) To deviate from the previous course or direction.

present participle of derail

The act by which something is derailed.

simple past tense and past participle of derail

(rail transport) The action of a locomotive or train leaving the rails along which it runs.

plural of derailment

One who, or that which, derails. / Synonym of derail: A device placed on railway tracks in order to cause a train to derail.

plural of derailer