to take the rest afforded by a suspension of voluntary bodily functions and the natural suspension, complete or partial, of consciousness; cease being awake.

Botany . to assume, esp. at night, a state similar to the sleep of animals, marked by closing of petals, leaves, etc.

to be dormant, quiescent, or inactive, as faculties.

to be careless or unalert; allow one's alertness, vigilance, or attentiveness to lie dormant

While England slept, Germany prepared for war.

to lie in death

They are sleeping in their tombs.

to take rest in (a specified kind of sleep)

He slept the sleep of the innocent.

to accommodate for sleeping; have sleeping accommodations for

This trailer sleeps three people.

to spend or pass in sleep (usually fol. by away or out )

to sleep the day away.

to recover from the effects of (a headache, hangover, etc.) by sleeping (usually fol. by off or away ).

the state of a person, animal, or plant that sleeps.

a period of sleeping

a brief sleep.

dormancy or inactivity.

the repose of death.

sleeper ( def. 10 ) . ?

sleep around, Informal . to have sexual relations with many partners, esp. in a casual way; be sexually promiscuous.

sleep in,

(esp. of domestic help) to sleep where one is employed.

to sleep beyond one's usual time of arising.

sleep on, to postpone making a decision about for at least a day

to sleep on a proposal till the end of the week.

sleep out,

(esp. of domestic help) to sleep away from one's place of employment.

Chiefly Northern U.S. to sleep away from one's home.

to sleep outdoors.

sleep over, to spend one or more nights in a place other than one's own home

Two friends will sleep over this weekend.

sleep together, to be sexual partners; have a sexual relationship.

sleep with, to have sexual relations with. ?

put to sleep

to put (an animal) to death in a humane way

to put a sick old dog to sleep.

noun

awakening , consciousness , wakefulness

verb

wake , waken

noun

bedtime , catnap , coma , dormancy , doze , dream , dullness , few z’s , forty winks * , hibernation , lethargy , nap , nod , repose , rest , sack time , sandman , shuteye , siesta , slumber , slumberland , snooze , torpidity , torpor , trance , carus , dogsleep , dozing , drowse , quiescence , somnipathy , somnolence , somnolism , sopor

verb

bed down , bunk * , catch a wink , catch forty winks , catnap , conk out * , cop some z’s , crash * , doze , dream , drop off * , drowse , fall asleep , fall out * , flop * , hibernate , hit the hay * , hit the sack , languish , nap , nod , nod off , oversleep , relax , repose , rest , retire , sack out , saw wood , slumber , snooze , snore , take a nap , turn in * , yawn , zonk out , zzz , coma , crash , death , dreamland , estivate , lethargy , lie dormant , lodge , lull , siesta , sopor , stupor

phrasal verb

oversleep , bed , copulate , couple , have , mate