out like a light
Instantly deeply asleep
Out like a light means falling asleep almost instantly, or losing consciousness suddenly.
The image is of a light switching off—one moment on, the next completely dark: She was out like a light before her head hit the pillow.
Also describes being knocked unconscious: One punch and he was out like a light.
- passed outLost awareness suddenly
- fast asleepDeeply, thoroughly unconscious
- blackoutComplete power loss
- slumberLight, restful unconsciousness
- outNot present here
out cold · zonked out · knocked out · out for the count · faint · lights out · hit the hay · dead to the world · dead asleep · snooze · wiped out · down for the count · comatose · flatlined · crashed · unconscious · sound asleep · conked
- sleepsleep, sleeping, nap, doze, slumber
- asleepasleep, fast asleep, deep sleep, sound asleep, snoring
- incapacitatedunconscious, knocked out, out cold, passed out, comatose
out like a lightwide awake
Totally alert and attentive
alert · awake · bright-eyed and bushy-tailed · up and at 'em · eyes wide open
out like a lighttossing and turning
Inability to sleep peacefully
wide awake · restless · sleepless · counting sheep · lying awake