A natural and periodic state of rest during which consciousness of the world is suspended:
— He didn't get enough sleep last night.

synonym: slumber.

Roget 683: inactivity; inaction etc. 681; inertness etc. 172; obstinacy etc. 606.    lull etc. (cessation) 142; quiescence etc. 265; rust, rustiness.    idleness, remissness etc. adj.; sloth, indolence, indiligence^†; dawdling etc. v.. ergophobia^†, otiosity^†.    dullness etc. adj.; languor; segnity^†, segnitude^†; lentor^†; sluggishness etc. (slowness) 275; procrastination etc. (delay) 133; torpor, torpidity, torpescence^†; stupor etc. (insensibility) 823; somnolence; drowsiness etc. adj.; nodding etc. v.; oscitation^†, oscitancy^†; pandiculation^†, hypnotism, lethargy; statuvolence heaviness^†, heavy eyelids.    sleep, slumber; sound sleep, heavy sleep, balmy sleep; Morpheus; Somnus; coma, trance, ecstasis^†, dream, hibernation, nap, doze, snooze, siesta, wink of sleep, forty winks, snore; hypnology^†.    dull work; pottering; relaxation etc. (loosening) 47; Castle of Indolence.    [Cause of inactivity] lullaby, sedative, tranquilizer, hypnotic, sleeping pill, relaxant, anaesthetic, general anaesthetic etc. 174; torpedo.    [person who is inactive] idler, drone, droil^†, dawdle, mopus^†; do-little faineant [Fr.], dummy, sleeping partner; afternoon farmer; truant etc. (runaway) 623; bummer^†, loafer, goldbrick, goldbicker, lounger, lazzarone [It]; lubber, lubbard^†; slow coach etc. (slow.) 275; opium eater, lotus eater; slug; lag^†, sluggard, slugabed; slumberer, dormouse, marmot; waiter on Providence, fruges consumere natus [Lat.].    ... show more

Roget 823: insensibility, insensibleness^†; moral insensibility; inertness, inertia; vis inertiae [Lat.]; impassibility, impassibleness; inappetency^†, apathy, phlegm, dullness, hebetude^†, supineness, lukewarmness^†.    cold fit, cold blood, cold heart; coldness, coolness; frigidity, sang froid [Fr.]; stoicism, imperturbation etc. (inexcitability) 826^†; nonchalance, unconcern, dry eyes; insouciance etc. (indifference) 866; recklessness etc. 863; callousness; heart of stone, stock and stone, marble, deadness.    torpor, torpidity; obstupefaction^†, lethargy, coma, trance, vegetative state; sleep etc. 683; suspended animation; stupor, stupefaction; paralysis, palsy; numbness etc. (physical insensibility) 376.    neutrality; quietism, vegetation.    ... show more

Roget 376: insensibility, physical insensibility; obtuseness etc. adj.; palsy, paralysis, paraesthesia [Med.], anaesthesia; sleep etc. 823; hemiplegia^†, motor paralysis; vegetable state; coma.    anaesthetic agent, opium, ether, chloroform, chloral; nitrous oxide, laughing gas; exhilarating gas, protoxide of nitrogen; refrigeration.    ... show more

Dutch: maffen, slapen, slaap, sluimer
Polish: spoczynek, sen

A torpid state resembling deep sleep.

synonym: sopor.

Dutch: slaap

A period of time spent sleeping:
— He felt better after a little sleep.

synonym: nap.

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.

Roget 687: repose, rest, silken repose; sleep etc. 683.    relaxation, breathing time; halt, stay, pause etc. (cessation) 142; respite.    day of rest, dies non, Sabbath, Lord's day, holiday, red-letter day, vacation, recess.    ... show more

Roget 265: rest; stillness etc. adj.; quiescence; stagnation, stagnancy; fixity, immobility, catalepsy; indisturbance^†; quietism.    quiet, tranquility, calm; repose etc. 687; peace; dead calm, anticyclone^†; statue-like repose; silence etc. 203; not a breath of air, not a mouse stirring; sleep etc. (inactivity) 683.    pause, lull etc. (cessation) 142; stand still; standing still etc. v.; lock; dead lock, dead stop, dead stand; full stop; fix; embargo.    resting place; gite [Fr.]; bivouac; home etc. (abode) 189; pillow etc. (support) 215; haven etc. (refuge) 666; goal etc. (arrival) 292.    ... show more

Dutch: kwijtschelding

Be asleep.

synonyms: catch some Z's, kip, log Z's, slumber.

Roget 683: be inactive etc. adj.; do nothing etc. 681; move slowly etc. 275; let the grass grow under one's feet; take one's time, dawdle, drawl, droil^†, lag, hang back, slouch; loll, lollop^†; lounge, poke, loaf, loiter; go to sleep over; sleep at one's post, ne battre que d'une aile [Fr.].    take it easy, take things as they come; lead an easy life, vegetate, swim with the stream, eat the bread of idleness; loll in the lap of luxury, loll in the lap of indolence; waste time, consume time, kill time, lose time; burn daylight, waste the precious hours.    idle away time, trifle away time, fritter away time, fool away time; spend time in, take time in; peddle, piddle; potter, pudder^†, dabble, faddle fribble^†, fiddle-faddle; dally, dilly-dally.    sleep, slumber, be asleep; hibernate; oversleep; sleep like a top, sleep like a log, sleep like a dormouse; sleep soundly, heavily; doze, drowze^†, snooze, nap; take a nap etc. n.; dream; snore one's best; settle to sleep, go to sleep, go off to sleep; doze off, drop off; fall asleep; drop asleep; close the eyes, seal up the eyes, seal up eyelids; weigh down the eyelids; get sleep, nod, yawn; go to bed, turn; get some z's, stack z's [Coll.].    languish, expend itself, flag, hang fire; relax.    render idle etc. adj.; sluggardize^†; mitigate etc. 174.    ... show more

Dutch: bronzen, keveren, knorren, maffen, meuren, pitten, rusten, slapen, snurken

Be able to accommodate for sleeping.