Standard Lemma guide

derail

noun · verb · 8 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • General-American: /ˌdəˈɹeɪ.əl/
  • General-American: /ˌdiːˈɹeɪ.əl/
  • US: Recorded audio is listed in the source snapshot.
  • rhymes with -eɪl
  • CMU ARPABET: D IH0 R EY1 L Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

Synonym of derailer: A device placed on railway tracks in order to cause a train to derail.

Definition source: English Wiktionary via Wiktextract

Examples

  • The derail was placed deliberately so that the train would fall into the river.

Meaning relationships

Synonyms: derailer

Antonyms: none provided

2

noun

Meaning 2

An instance of diverting a conversation or debate from its original topic.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

verb

Meaning 3

To cause to come off the tracks.

Definition source: English Wiktionary via Wiktextract

Usage: transitive

Examples

  • The train was destroyed when it was derailed by the collision.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

verb

Meaning 4

To come off the tracks.

Definition source: English Wiktionary via Wiktextract

Usage: intransitive

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

verb

Meaning 5

To deviate from the previous course or direction.

Definition source: English Wiktionary via Wiktextract

Usage: figuratively, intransitive

Examples

  • The conversation derailed once James brought up politics.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

verb

Meaning 6

To cause to deviate from a set course or direction.

Definition source: English Wiktionary via Wiktextract

Usage: figuratively, transitive

Examples

  • The protesting students derailed the professor's lecture.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

verb

Meaning 7

run off or leave the rails

Definition source: Princeton WordNet 3.0

Examples

  • the train derailed because a cow was standing on the tracks

Meaning relationships

Synonyms: jump

Antonyms: none provided

Broader terms: travel, go, move, locomote

8

verb

Meaning 8

cause to run off the tracks

Definition source: Princeton WordNet 3.0

Examples

  • they had planned to derail the trains that carried atomic waste

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: sabotage, undermine, countermine, counteract, subvert, weaken

History

Etymology

From French dérailler (“to go off the rails”). Analyzable as de- + rail.

Across languages

Translations

46 source translations are retained for this English entry.

  • Swedish: spårspärr — railway device
  • Swedish: sidospår — diverting conversation
  • Swedish: avstickare — diverting conversation
  • Bulgarian: дерайлирам (derajliram) — to cause to come off the tracks
  • Catalan: descarrilar — to cause to come off the tracks
  • Chinese Mandarin: 越軌 /越轨 (yuèguǐ) — to cause to come off the tracks
  • Chinese Mandarin: 出軌 /出轨 (chūguǐ) — to cause to come off the tracks
  • Chinese Mandarin: 脫軌 /脱轨 (tuōguǐ) — to cause to come off the tracks
  • Czech: vykolejit — to cause to come off the tracks
  • Dutch: ontsporen — to cause to come off the tracks
  • Finnish: suistua raiteilta — to cause to come off the tracks
  • French: dérailler — to cause to come off the tracks
  • German: entgleisen — to cause to come off the tracks
  • Greek: εκτροχιάζομαι (ektrochiázomai) — to cause to come off the tracks
  • Hungarian: kisiklik — to cause to come off the tracks
  • Italian: deragliare — to cause to come off the tracks
  • Malayalam: പാളം തെറ്റുക (pāḷaṁ teṟṟuka) — to cause to come off the tracks
  • Norwegian: spore av — to cause to come off the tracks
  • Polish: wykolejać się — to cause to come off the tracks
  • Polish: wykoleić się — to cause to come off the tracks
  • Portuguese: descarrilar — to cause to come off the tracks
  • Portuguese: descarrilhar — to cause to come off the tracks
  • Romanian: deraia — to cause to come off the tracks
  • Russian: сходи́ть с ре́льсов (sxodítʹ s rélʹsov) — to cause to come off the tracks
  • Russian: сойти́ с ре́льсов (sojtí s rélʹsov) — to cause to come off the tracks
  • Spanish: descarrilar — to cause to come off the tracks
  • Spanish: desrielar — to cause to come off the tracks
  • Spanish: descarriar — to cause to come off the tracks
  • Swedish: spåra ur — to cause to come off the tracks
  • Vietnamese: trật bánh — to cause to come off the tracks
  • Welsh: direilio — to cause to come off the tracks
  • Finnish: suistua — to deviate from the previous course or direction
  • Finnish: suistua raiteilta — to deviate from the previous course or direction
  • French: dérailler — to deviate from the previous course or direction
  • German: entgleisen — to deviate from the previous course or direction
  • Italian: deragliare — to deviate from the previous course or direction
  • Italian: sbandare — to deviate from the previous course or direction
  • Latin: dēlīrō — to deviate from the previous course or direction
  • Finnish: suistaa — to cause to deviate from a set course or direction
  • Finnish: suistaa raiteilta — to cause to deviate from a set course or direction
  • German: zum Entgleisen bringen — to cause to deviate from a set course or direction
  • Hungarian: kisiklat — to cause to deviate from a set course or direction
  • Romanian: submina — to cause to deviate from a set course or direction
  • Russian: пуска́ть под отко́с (puskátʹ pod otkós) — to cause to deviate from a set course or direction
  • Russian: срыва́ть (sryvátʹ) — to cause to deviate from a set course or direction
  • Russian: сорва́ть (sorvátʹ) — to cause to deviate from a set course or direction