sleep

If you're tired, you probably need to sleep so lie down and close your eyes. When you wake up, you'll feel much better.

Everyone needs sleep and most of us get some at least once a day. Maybe that's why sleep is used in so many expressions. If you “sleep on it” you'll wait to make a decision until tomorrow. If you “sleep over,” you stay at someone's place for the night. A person who “lets sleeping dogs lie” knows when not to stir up trouble. If you slip into eternal sleep, you won't be needing any more naps.

Definitions of sleep
1

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

“he didn't get enough sleep last night”
Synonyms:
slumber
Types:
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sleeping
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
shuteye
informal term for sleep
Type of:
physical condition, physiological condition, physiological state
the condition or state of the body or bodily functions

n a period of time spent sleeping

“he felt better after a little sleep
Synonyms:
nap
Types:
beauty sleep
sleep before midnight
kip
sleep
Type of:
period, period of time, time period
an amount of time

n a torpid state resembling deep sleep

Synonyms:
sopor
Type of:
physical condition, physiological condition, physiological state
the condition or state of the body or bodily functions

n euphemisms for death (based on an analogy between lying in a bed and in a tomb)

“they had to put their family pet to sleep
Synonyms:
eternal rest, eternal sleep, quietus, rest
Type of:
death
the absence of life or state of being dead

v be asleep

Synonyms:
catch some Z's, kip, log Z's, slumber
Antonyms:
wake
be awake, be alert, be there
Types:
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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:
rest
be at rest

v be able to accommodate for sleeping

“This tent sleeps six people”
Type of:
accommodate, admit, hold
have room for; hold without crowding

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