sound asleep
Dead to everything
Sound asleep means deeply and completely asleep, not easily roused.
The sound here is an old adjective meaning thorough or unbroken—the same sense found in a sound beating or sound judgment.
Someone who is sound asleep won't wake at minor disturbances: The baby was finally sound asleep.
- fast asleepDeeply, thoroughly unconscious
- dead to the worldDeeply, unrousably asleep
- out like a lightSuddenly and completely unconscious
- comatoseDeeply unconscious, unrousable
- deepFar from surface
deep sleep · out cold · sawing logs · catching some z's · passed out · slumber · conked out · nodded off · rest · snooze · sleep spindles · quiet · profound · unconsciousness · relax · away with the fairies · peaceful · bed
- asleepasleep, fast asleep, deep sleep, snoring, sawing logs
sound asleepwide awake
Totally alert and attentive
fully awake · alert · awake · conscious · vigilant
sound asleeprestless
Unable to be still
tossing and turning · half-awake · half-asleep · drowsy · dozing
sound, sounds, soundly, sounding, sounded, resound, unsound, soundness, soundproof