Standard Lemma guide

sleeper

name · noun · verb · 29 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.

  • /ˈsliːpə(ɹ)/
  • Australia: Recorded audio is listed in the source snapshot.
  • rhymes with -iːpə(ɹ)
  • CMU ARPABET: S L IY1 P ER0 Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

name

Meaning 1

A surname.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Someone who sleeps.

Definition source: English Wiktionary via Wiktextract

Examples

  • I'm a light sleeper: I get woken up by the smallest of sounds.
  • She's a heavy sleeper: it takes a lot to wake her up.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

That which lies dormant, as a law.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

A spy, saboteur, or terrorist who lives unobtrusively in a community until activated by a prearranged signal; may be part of a sleeper cell.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: sleeper agent

Antonyms: none provided

5

noun

Meaning 5

A small starter earring, worn to prevent a piercing from closing.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

6

noun

Meaning 6

A railway sleeping car.

Definition source: English Wiktionary via Wiktextract

Examples

  • We spent a night on an uncomfortable sleeper between Athens and Vienna.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

7

noun

Meaning 7

A sleeper hold.

Definition source: English Wiktionary via Wiktextract

Topics: government, hobbies, lifestyle, martial-arts, military, politics, sports, war, wrestling

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

8

noun

Meaning 8

Something that achieves unexpected success after an interval of time.

Definition source: English Wiktionary via Wiktextract

Examples

  • A box-office bomb when it first came out, the film was a sleeper, becoming much more popular decades after being released.

Meaning relationships

Synonyms: sleeper hit

Antonyms: none provided

9

noun

Meaning 9

Any of family Odontobutidae of goby-like bottom-feeding freshwater fish.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

10

noun

Meaning 10

A nurse shark (family Ginglymostomatidae).

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

11

noun

Meaning 11

A type of pajama for a person, especially a child, that covers the whole body, including the feet.

Definition source: English Wiktionary via Wiktextract

Examples

  • Aaron, Devin, and Laura looked so comfy in their sleepers.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

12

noun

Meaning 12

An automobile which has been internally modified to excess, while retaining a mostly stock appearance in order to fool opponents in a drag race, or to avoid the attention of the police.

Definition source: English Wiktionary via Wiktextract

Usage: slang

Topics: automotive, transport, vehicles

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: cop magnet, rice burner, racecar

13

noun

Meaning 13

(pharmacology) A sedative.

Definition source: English Wiktionary via Wiktextract

Usage: slang

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

14

noun

Meaning 14

A bet placed on the gambling table and then forgotten about by the gambler.

Definition source: English Wiktionary via Wiktextract

Usage: slang

Topics: gambling, games

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

15

noun

Meaning 15

A pod or similar device containing a person in cryosleep.

Definition source: English Wiktionary via Wiktextract

Topics: literature, media, publishing, science-fiction

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

16

noun

Meaning 16

A railroad tie.

Definition source: English Wiktionary via Wiktextract

Usage: UK

Topics: rail-transport, railways, transport

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: tie

Antonyms: none provided

17

noun

Meaning 17

A structural beam in a floor running perpendicular to both the joists beneath and floorboards above.

Definition source: English Wiktionary via Wiktextract

Topics: business, carpentry, construction, manufacturing

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

18

noun

Meaning 18

A heavy floor timber in a ship's bottom.

Definition source: English Wiktionary via Wiktextract

Topics: nautical, transport

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

19

noun

Meaning 19

The lowest, or bottom, tier of casks.

Definition source: English Wiktionary via Wiktextract

Topics: nautical, transport

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

20

verb

Meaning 20

To mark a calf by cutting its ear.

Definition source: English Wiktionary via Wiktextract

Usage: rare

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

21

noun

Meaning 21

an unexpected hit

Definition source: Princeton WordNet 3.0

Examples

  • that movie was the sleeper of the summer

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: hit, smash, smasher, strike, bang

22

noun

Meaning 22

tropical fish that resembles a goby and rests quietly on the bottom in shallow water

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: sleeper goby

Antonyms: none provided

Broader terms: percoid fish, percoid, percoidean

23

noun

Meaning 23

a piece of furniture that can be opened up into a bed

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: furniture, piece of furniture, article of furniture

24

noun

Meaning 24

pajamas with feet; worn by children

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: pajama, pyjama, pj's, jammies

25

noun

Meaning 25

a passenger car that has berths for sleeping

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: sleeping car, wagon-lit

Antonyms: none provided

Broader terms: passenger car, coach, carriage

26

noun

Meaning 26

one of the cross braces that support the rails on a railway track

Definition source: Princeton WordNet 3.0

Examples

  • the British call a railroad tie a sleeper

Meaning relationships

Synonyms: tie, railroad tie, crosstie

Antonyms: none provided

Broader terms: brace, bracing

27

noun

Meaning 27

a rester who is sleeping

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: slumberer

Antonyms: none provided

Broader terms: rester

Narrower terms: dreamer, Rip van Winkle, sleeping beauty, sleepwalker, somnambulist, noctambulist, snorer, somniloquist

28

noun

Meaning 28

an unexpected achiever of success

Definition source: Princeton WordNet 3.0

Examples

  • the winner was a true sleeper--no one expected him to get it

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: achiever, winner, success, succeeder

29

noun

Meaning 29

a spy or saboteur or terrorist planted in an enemy country who lives there as a law-abiding citizen until activated by a prearranged signal

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

Broader terms: saboteur, wrecker, diversionist, spy, undercover agent, terrorist

History

Etymology

From Middle English sleper, equivalent to sleep + -er.

Compare Norwegian sleip (“a sleeper (a timber); as adjective, slippery, smooth”). See slape.

Across languages

Translations

54 source translations are retained for this English entry.

  • Bulgarian: спящ човек (spjašt čovek) — someone who sleeps
  • Catalan: dormilega — someone who sleeps
  • Dutch: slaper — someone who sleeps
  • Esperanto: dormanto — someone who sleeps
  • Finnish: nukkuja — someone who sleeps
  • French: dormeur — someone who sleeps
  • German: Schläfer — someone who sleeps
  • Hungarian: alvó — someone who sleeps
  • Irish: codlatóir — someone who sleeps
  • Korean: 자는 사람 (janeun saram) — someone who sleeps
  • Latin: dormītor — someone who sleeps
  • Marathi: झोपणारा (jhopṇārā) — someone who sleeps
  • Marathi: झोपणारी (jhopṇārī) — someone who sleeps
  • Polish: śpiący — someone who sleeps
  • Portuguese: dorminhoco — someone who sleeps
  • Portuguese: dorminhoca — someone who sleeps
  • Russian: со́ня (sónja) — someone who sleeps
  • Spanish: dormilón — someone who sleeps
  • Swahili: mlalaji — someone who sleeps
  • Swedish: sovare — someone who sleeps
  • Turkish: uykucu — someone who sleeps
  • Walloon: doirmeu — someone who sleeps
  • Walloon: doirmeuse — someone who sleeps
  • Walloon: soctant — someone who sleeps
  • Walloon: soctante — someone who sleeps
  • Welsh: cysgadur — someone who sleeps
  • Finnish: kuollut kirjain — that which lies dormant, as a law
  • Finnish: nukkuva agentti — spy, saboteur or terrorist waiting to be activated
  • German: Schläfer — spy, saboteur or terrorist waiting to be activated
  • Russian: спя́щий аге́нт (spjáščij agént) — spy, saboteur or terrorist waiting to be activated
  • Russian: крот (krot) — spy, saboteur or terrorist waiting to be activated
  • Russian: диверса́нт (diversánt) — spy, saboteur or terrorist waiting to be activated
  • Russian: сабота́жник (sabotážnik) — spy, saboteur or terrorist waiting to be activated
  • Finnish: harjoituskorvarengas — starter earring
  • Irish: fáinne cluaise simplí — starter earring
  • Finnish: rohmutokko — freshwater fish of the family Odontobutidae
  • Finnish: unihaalari — type of pajamas that covers the whole body
  • German: Strampelanzug — type of pajamas that covers the whole body
  • Spanish: pijama con los pies — type of pajamas that covers the whole body
  • Spanish: durmiente — rung on a train track
  • Bulgarian: траверса (traversa) — structural timber in a floor perpendicular to the joists and floorboards
  • German: Lagerholz — structural timber in a floor perpendicular to the joists and floorboards
  • German: Futterholz — structural timber in a floor perpendicular to the joists and floorboards
  • German: Unterlageholz — structural timber in a floor perpendicular to the joists and floorboards
  • German: Lagerholz — structural beam at the bottom of a wall, a roof framework or a similar structure
  • German: Schwelle — structural beam at the bottom of a wall, a roof framework or a similar structure
  • German: Schwellenholz — structural beam at the bottom of a wall, a roof framework or a similar structure
  • German: Lagerbalken — structural beam at the bottom of a wall, a roof framework or a similar structure
  • German: Fußschwelle — structural beam at the bottom of a wall, a roof framework or a similar structure
  • German: Unterlageholz — structural beam at the bottom of a wall, a roof framework or a similar structure
  • German: Mauerlatte — structural beam at the bottom of a wall, a roof framework or a similar structure
  • German: Fußpfette — structural beam at the bottom of a wall, a roof framework or a similar structure
  • German: Fusspfette — structural beam at the bottom of a wall, a roof framework or a similar structure
  • German: Wandpfette — structural beam at the bottom of a wall, a roof framework or a similar structure
Real reading context

sleeper in complete knowledge articles