• WordNet 3.6
    • v sleep be asleep
    • v sleep be able to accommodate for sleeping "This tent sleeps six people"
    • n sleep euphemisms for death (based on an analogy between lying in a bed and in a tomb) "she was laid to rest beside her husband","they had to put their family pet to sleep"
    • n sleep a natural and periodic state of rest during which consciousness of the world is suspended "he didn't get enough sleep last night","calm as a child in dreamless slumber"
    • n sleep a torpid state resembling deep sleep
    • n sleep a period of time spent sleeping "he felt better after a little sleep","there wasn't time for a nap"
    • ***

Additional illustrations & photos:

"Valeria sleeps in peace." "Valeria sleeps in peace."
Now I Lay Me Down to Sleep 094 Now I Lay Me Down to Sleep 094
The princess, holding a sword, stands over the sleeping snake The princess, holding a sword, stands over the sleeping snake
The princess pulls the letter from the sleeping man's turban The princess pulls the letter from the sleeping man's turban
Let sleeping dogs lie Let sleeping dogs lie

Webster's Revised Unabridged Dictionary
  • Interesting fact: Koalas sleep up to 19 hours a day
    • Sleep imp. of Sleep. Slept.
    • n Sleep A natural and healthy, but temporary and periodical, suspension of the functions of the organs of sense, as well as of those of the voluntary and rational soul; that state of the animal in which there is a lessened acuteness of sensory perception, a confusion of ideas, and a loss of mental control, followed by a more or less unconscious state.☞ Sleep is attended by a relaxation of the muscles, and the absence of voluntary activity for any rational objects or purpose. The pulse is slower, the respiratory movements fewer in number but more profound, and there is less blood in the cerebral vessels. It is susceptible of greater or less intensity or completeness in its control of the powers. "A man that waketh of his sleep .""O sleep , thou ape of death."
    • Sleep To be careless, inattentive, or uncouncerned; not to be vigilant; to live thoughtlessly.
    • Sleep To be dead; to lie in the grave.
    • Sleep To be slumbering in; -- followed by a cognate object; as, to sleep a dreamless sleep.
    • Sleep To be, or appear to be, in repose; to be quiet; to be unemployed, unused, or unagitated; to rest; to lie dormant; as, a question sleeps for the present; the law sleeps .
    • Sleep To give sleep to; to furnish with accomodations for sleeping; to lodge.
    • Sleep To take rest by a suspension of the voluntary exercise of the powers of the body and mind, and an apathy of the organs of sense; to slumber. "Watching at the head of these that sleep ."
    • ***
Century Dictionary and Cyclopedia
  • Interesting fact: You burn more calories sleeping than you do watching television
    • sleep To take the repose or rest which is afforded by a suspension of the voluntary exercise of the bodily functions and the natural suspension, complete or partial, of consciousness; slumber. See the noun.
    • sleep To fall asleep; go to sleep; slumber.
    • sleep To lie or remain dormant; remain inactive or unused; be latent; be or appear quiet or quiescent; repose quietly: as, the sword sleeps in the scabbard. Sails are said to sleep when so steadily filled with wind as to be without motion or sound; and a top is said to sleep when it spins so rapidly and smoothly that the motion cannot be observed.
    • sleep To rest, as in the grave; lie buried.
    • sleep To be careless, remiss, inattentive, or unconcerned; live thoughtlessly or carelessly; take things easy.
    • sleep In botany, to assume a state, as regards vegetable functions, analogous to the sleeping of animals. See sleep, n., 5.
    • sleep To be or become numb through stoppage of the circulation: said of parts of the body. See asleep.
    • sleep Synonyms and
    • sleep Drowse, Doze, Slumber, Sleep, nap, rest, repose. The first four words express the stages from full consciousness to full unconsciousness in sleep. Sleep is the standard or general word. Drowse expresses that state of heaviness when one does not quite surrender to sleep. Doze expresses the endeavor to take a sort of waking nap. Slumber has largely lost its earlier sense of the light beginning of sleep, and is now more often an elevated or poetical word for sleep.
    • sleep To take rest in: with a cognate object, and therefore transitive in form only: as, to sleep the sleep that knows no waking.
    • sleep With away: To pass or consume in sleeping: as, to sleep away the hours; to sleep away one's life.
    • sleep With off or out: To get rid of or overcome by sleeping; recover from during sleep: as, to sleep off a headache or a debauch.
    • sleep To afford or provide sleeping-accommodation for: as, a car or cabin that can sleep thirty persons.
    • n sleep A state of general marked quiescence of voluntary and conscious (as well as many involuntary and unconscious) functions, alternating more or less regularly with periods of activity. In human sleep, when it is deep, the body lies quiet, with the muscles relaxed, the pulse rate lower than during the waking hours, and the respiration less frequent but deep, while the person does not react to slight sensory stimuli. Intestinal peristalsis is diminished; secretion is less actively carried on; the pupils are contracted; and the brain is said to be anemic. If the depth of sleep is measured by the noise necessary to waken the sleeper, it reaches its maximum within the first hour and then diminishes, at first rapidly, then more slowly.
    • n sleep A period of sleep: as, a short sleep.
    • n sleep Repose; rest; quiet; dormancy; hence, the rest of the grave; death.
    • n sleep Specifically, in zoology, the protracted and profound dormancy or torpidity into which various animals fall periodically at certain seasons of the year. Two kinds of this sleep are distinguished as summer and winter sleep, technically known as estivation and hibernation (see these words).
    • n sleep In botany, nyctitropism, or the sleep-movement of plants, a condition brought about in the foliar or floral organs of certain plants, in which they assume at nightfall, or just before, positions unlike those which they have maintained during the day. These movements in the case of leaves are usually drooping movements, and are therefore suggestive of rest, but the direction of movement is different in different cases. Thus, among the Oxalidaceæ the sleep-movement consists in the downward sinking of the leaflets, which become at the same time folded on themselves. Among the Leguminosæ, the leaflets, in some cases, simply sink vertically downward (Phaseoleæ); in others, they sink down while the main petiole rises (terminal leaflet of Desmodium); in others, they sink downward and twist on their axes so that their upper surfaces are in contact beneath the main petiole (Cassia); in others, again, they rise and bend backward toward the insertion of the petiole (Coronilla); in others, they rise, and the main petiole rises also, whereas in Mimosa pudica the leaflets rise and bend forward, while the main petiole falls. In Marsilea the leaflets rise up, the two upper ones being embraced by the two lower.
    • ***
Chambers's Twentieth Century Dictionary
  • Interesting fact: Ants do not sleep
    • v.i Sleep slēp to take rest by relaxation: to become unconscious: to slumber: to rest: to be motionless or inactive: to remain unnoticed: to live thoughtlessly: to be dead: to rest in the grave
    • n Sleep the state of one who, or that which, sleeps: slumber: rest: the dormancy of some animals during winter:
    • n Sleep the state of resting in sleep:
    • n Sleep (bot.) nyctitropism
    • n Sleep (Shak.) the state of being at rest or in abeyance
    • adj Sleep fast (Shak.) (of sleep) sound
    • ***


  • John Milton
    “Millions of spiritual creatures walk the earth unseen, both when we sleep and when we awake.”
  • Source Unknown
    Source Unknown
    “A conscience is like a baby. It has to go to sleep before you can.”
  • Francis Beaumont
    Francis Beaumont
    “Let no man fear to die, we love to sleep all, and death is but the sounder sleep.”
  • Leonardo Da Vinci
    “As a well-spent day brings happy sleep, so a life well spent brings happy death.”
  • Percy Bysshe Shelley
    “How wonderful is death! Death and his brother sleep.”
  • Virginia Woolf
    “One cannot think well, love well, sleep well, if one has not dined well.”


Let sleeping dogs lie - If someone is told to let sleeping dogs lie, it means that they shouldn't disturb a situation as it would result in trouble or complications.
Sleep like a baby - If you sleep very well, you sleep like a baby.
Sleep like a log - If you sleep like a log, you sleep very soundly.
Sleep well- don't let the bedbugs bite - This is a way of wishing someone a good night's sleep.
Talk a glass eye to sleep - Someone who could talk a glass eye to sleep is very boring and repetitive.


Webster's Revised Unabridged Dictionary
OE. slepen, AS. slpan,; akin to OFries. slpa, OS. slāpan, D. slapen, OHG. slāfan, G. schlafen, Goth. slpan, and G. schlaff, slack, loose, and L. labi, to glide, slide, labare, to totter. Cf. Lapse
Chambers's Twentieth Century Dictionary
A.S. fæst; Ger. fest.


In literature:

What I want is sleep, sleep, rest and sleep.
"The Trail of '98" by Robert W. Service
At last sleep, a deep, fatigued sleep, enveloped her.
"Tess of the Storm Country" by Grace Miller White
They could not sleep; if war was going to be always as exciting as this, how did soldiers ever sleep?
"The Long Roll" by Mary Johnston
You may sleep sound to-night.
"A Modern Tomboy" by L. T. Meade
He drank his fill and went to sleep.
"Russian Fairy Tales" by W. R. S. Ralston
I had yet to sleep at many post stations and to change horses and vehicles many times.
"The Land of the Long Night" by Paul du Chaillu
Then An-ina go out, and sleep, sleep, and not wake never no more.
"The Heart of Unaga" by Ridgwell Cullum
She was still sleeping the heavy sleep of utter mental and bodily prostration.
"Cruel As The Grave" by Mrs. Emma D. E. N. Southworth
Therefore, plenty of food, plenty of rest, plenty of sleep, are required.
"The Physical Life of Woman:" by Dr. George H Napheys
It'll be tough to sleep out in this snow, but it's safer.
"The Snowshoe Trail" by Edison Marshall

In poetry:

What wealth would they freely give then,
For the sleep that I soon shall be sleeping!
To never feel sorrow again—
To know not its watching and weeping!
"Brandreth's Soliloquy In Prison." by Samuel Bamford
Awake! I say, awake, good people!
And be for once alive and gay;
Come, let's be merry; stir the tipple;
How can you sleep?
Whilst I do play? How can you sleep? &c.
"Ode: To be performed" by William Shenstone
`She sleeps: let us too, let all evil, sleep.
He also sleeps—another sleep than ours.
He can do no more wrong: forgive him, dear,
And I shall sleep the sounder!'
"Sea Dreams" by Alfred Lord Tennyson
"I did not sleep long, feeling that in sleep
I did some loved one wrong, so that the sun
Had only just arisen from the deep
Still land of colours, when before me one
"King Arthur's Tomb" by William Morris
In the hollow where drifted dreams lie deep
It is good to sleep: it was good to sleep:
But my bed has grown cold with the drip of the dew,
And I cannot sleep as I used to do.
"The Return" by Edith Nesbit
Oh, of my truest love well worthy he,
And near was I, ah, nearest to his heart;
But ships are parted on the dreary sea
Swept by the waves, forever swept apart--
Oh, baby, sleep, my baby, sleep.
"The Fisher's Wife" by Marietta Holley

In news:

Thomas Eco-House: Not every house has a fire pole in the living room for speedy (and fun) descent from the sleeping areas above.
Marilou Lords, a Sacramento restaurateur who co-owned and ran the Broiler Steakhouse, died Aug 23 of a heart attack in her sleep, her family said.
"He couldn't sleep at all," said his wife, Charlene, with a laugh.
Sleep apnea is a condition that not only disrupts sleep, it can lead to high blood pressure, heart attacks, and even stroke if left untreated.
Most people think treating sleep apnea means wearing a bulky sleep mask to bed.
You may dye your gray hairs and Botox your wrinkles, but you will never sleep the sleep of your youth again.
PhD, director of the sleep laboratory at New York Hospital-Cornell Medical Center in Manhattan and author of Get a Good Night's Sleep.
Even though you know you need eight hours of sleep a night, you probably sleep much less than that.
The noticeable difference in behavior after a half-hour of extra sleep confirms that kids need more sleep, shows a new study.
What if, when you went camping, you could leave the tent behind, as well as the sleeping bag, sleeping mat and everything else.
Device Helps Diagnose Sleep Apnea Outside of a Sleep Lab.
Integrating a sleep disorder diagnostic tool into hospital cardiac care, GE Healthcare offers the MARS Virtual Sleep Lab (VSL).
A visitor kisses a sleeping women during a new art project called "Sleeping Beautiy," created by a Canadian-Ukrainian artist Taras Polataiko in The National Art Museum in Kiev , Ukraine, Friday, Sept 7, 2012.
Unfortunately, co-sleeping and other unsafe sleep practices can lead to death for an infant.
For some reason, I cannot sleep, and I'm nowhere being close to sleeping.

In science:

Random links arise because of packet loss or drop, or when a sensor is activated from sleep mode at a random time.
Weight Optimization for Consensus Algorithms with Correlated Switching Topology
Pick a sleeping half-edge uniformly at random and let v1 denote the vertex it is attached to.
The component sizes of a critical random graph with given degree sequence
IEEE 802.16e or Mobile WiMAX also has similar provisions for sleep mode mechanisms for mobile stations .
Green Cellular Networks: A Survey, Some Research Issues and Challenges
In future wireless standards, energy saving potential of BSs needs to be exploited by designing protocols to enable sleep modes in BSs.
Green Cellular Networks: A Survey, Some Research Issues and Challenges
The authors in suggest making use of downlink DTX schemes for BSs by enabling micro-sleep modes (in the order of milliseconds) and deep-sleep modes (extended periods of time).
Green Cellular Networks: A Survey, Some Research Issues and Challenges