sound asleep

adjective

Sleeping still and silently.

Meanings

adjectivesound asleep (not comparable)
  1. idiomaticnot comparableSleeping still and silently.

    When Frere had come down, an hour before, the prisoners were all snugly between their blankets. They were not so now; though, at the first clink of the bolts, they would be back again in their old positions, to all appearances sound asleep.

    1874, Marcus Clarke, chapter V, in For the Term of His Natural Life

    Synonyms: fast asleep, down for the count · Antonyms: wide awake, awake

Synonyms & antonyms

adjectiveSleeping still and silently.

More synonyms by meaning

adjectivesleeping deeply

Synonym sets from Open English WordNet, CC BY 4.0.

Translations

Chinese Mandarin 沉睡, 熟睡
  • 沉睡 (chénshuì)sleeping still and silently
  • 熟睡 (shúshuì)sleeping still and silently
Estonian sügavas unes
  • sügavas unessleeping still and silently
Finnish syvässä unessa
  • syvässä unessasleeping still and silently
French dormir à poings fermés
  • dormir à poings ferméssleeping still and silently
German fest schlafend, tief schlafend
  • fest schlafendsleeping still and silently
  • tief schlafendsleeping still and silently
Portuguese ferrado no sono
  • ferrado no sonosleeping still and silently
Russian крепко спящий
  • крепко спящий (krepko spjaščij)sleeping still and silently
Turkish mışıl mışıl uyuyan
  • mışıl mışıl uyuyansleeping still and silently
Cite this entry
APA

sound asleep. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/sound%20asleep

MLA

“sound asleep.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/sound%20asleep. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “sound asleep,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/sound%20asleep.

Source: sound asleep on Wiktionary, CC BY-SA 4.0.