Slumber means "sleep" — as a verb or noun. If you're a sound sleeper, you might slumber peacefully right through a thunderstorm, your slumber undisturbed.

To slumber is to sleep, sometimes specifically to sleep lightly or doze. You can slumber in your bed, in your airplane seat, or through your alarm in the morning. Slumber can also describe a peacefulness, like your quiet street that seems to slumber early in the morning. The phrase slumber party was first used in the 1940s to mean a gathering held at night, that usually involves very little slumbering.

Definitions of slumber

v be asleep

catch some Z's, kip, log Z's, sleep
be awake, be alert, be there
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bundle, practice bundling
sleep fully clothed in the same bed with one's betrothed
catch a wink, catnap, nap
take a siesta
sleep in, sleep late
sleep later than usual or customary
hibernate, hole up
sleep during winter
aestivate, estivate
sleep during summer
doze, drowse, snooze
sleep lightly or for a short period of time
Type of:
be at rest

n a natural and periodic state of rest during which consciousness of the world is suspended

“calm as a child in dreamless slumber
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the state of being asleep
NREM, NREM sleep, nonrapid eye movement, nonrapid eye movement sleep, orthodox sleep
a recurring sleep state during which rapid eye movements do not occur and dreaming does not occur; accounts for about 75% of normal sleep time
REM, REM sleep, paradoxical sleep, rapid eye movement, rapid eye movement sleep
a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep
informal term for sleep
Type of:
physical condition, physiological condition, physiological state
the condition or state of the body or bodily functions

n a dormant or quiescent state

Type of:
dormancy, quiescence, quiescency
a state of quiet (but possibly temporary) inaction

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