Standard Lemma guide

lights-out

adj · noun · 7 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

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  • /ˈlaɪts.aʊt/
  • US: Recorded audio is listed in the source snapshot.

1

adj

Meaning 1

Done or performed in the dark because of a fully automated working environment. Often describes night shift or third shift work.

Definition source: English Wiktionary via Wiktextract

Usage: not-comparable

Topics: business, manufacturing

Examples

  • lights-out manufacturing
  • lights-out production
  • Their night shift is lights-out production. Their day shift handles tooling, setup, and staging to make sure that everything is ready for the next lights-out run.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

The time at night at which artificial lights are to be turned off, a curfew or bedtime.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

The prescribed bedtime for persons living in a boarding school or staying in a hospital.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable

Examples

  • We were all expected to be in bed by lights-out.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

Something hopeless, over; unconsciousness.

Definition source: English Wiktionary via Wiktextract

Usage: euphemistic, idiomatic, uncountable

Examples

  • It's gonna be lights out for you, pal!

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

A decisive play.

Definition source: English Wiktionary via Wiktextract

Usage: idiomatic, uncountable

Topics: hobbies, lifestyle, sports

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

(military) signal to turn the lights out

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: taps

Antonyms: none provided

Broader terms: bugle call

7

noun

Meaning 7

a prescribed bedtime

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: bedtime

History

Etymology

No etymology was provided for this word.

Across languages

Translations

9 source translations are retained for this English entry.

  • Czech: večerka — the time at night at which artificial lights are to be turned off, a curfew or bedtime
  • French: couvre-feu — the time at night at which artificial lights are to be turned off, a curfew or bedtime
  • Hungarian: villanyoltás — the time at night at which artificial lights are to be turned off, a curfew or bedtime
  • Hungarian: lámpaoltás — the time at night at which artificial lights are to be turned off, a curfew or bedtime
  • Russian: отбой (otboj) — the time at night at which artificial lights are to be turned off, a curfew or bedtime
  • Czech: večerka — the prescribed bedtime for persons living in a boarding school or staying in a hospital
  • Hungarian: villanyoltás — the prescribed bedtime for persons living in a boarding school or staying in a hospital
  • Hungarian: lámpaoltás — the prescribed bedtime for persons living in a boarding school or staying in a hospital
  • Russian: отбой (otboj) — the prescribed bedtime for persons living in a boarding school or staying in a hospital