verb, slept, sleep⋅ing, noun | 1. | to take the rest afforded by a suspension of voluntary bodily functions and the natural suspension, complete or partial, of consciousness; cease being awake. |
| 2. | Botany. to assume, esp. at night, a state similar to the sleep of animals, marked by closing of petals, leaves, etc. |
| 3. | to be dormant, quiescent, or inactive, as faculties. |
| 4. | to be careless or unalert; allow one's alertness, vigilance, or attentiveness to lie dormant: While England slept, Germany prepared for war. |
| 5. | to lie in death: They are sleeping in their tombs. |
| 6. | to take rest in (a specified kind of sleep): He slept the sleep of the innocent. |
| 7. | to accommodate for sleeping; have sleeping accommodations for: This trailer sleeps three people. |
| 8. | to spend or pass in sleep (usually fol. by away or out): to sleep the day away. |
| 9. | to recover from the effects of (a headache, hangover, etc.) by sleeping (usually fol. by off or away). |
| 10. | the state of a person, animal, or plant that sleeps. |
| 11. | a period of sleeping: a brief sleep. |
| 12. | dormancy or inactivity. |
| 13. | the repose of death. |
| 14. | sleeper (def. 10). |
| 15. | sleep around, Informal. to have sexual relations with many partners, esp. in a casual way; be sexually promiscuous. |
| 16. | sleep in,
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| 17. | sleep on, to postpone making a decision about for at least a day: to sleep on a proposal till the end of the week. |
| 18. | sleep out,
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| 19. | sleep over, to spend one or more nights in a place other than one's own home: Two friends will sleep over this weekend. |
| 20. | sleep together, to be sexual partners; have a sexual relationship. |
| 21. | sleep with, to have sexual relations with. |
| 22. | put to sleep, to put (an animal) to death in a humane way: to put a sick old dog to sleep. |

| 1. | a person or thing that sleeps. |
| 2. | a heavy horizontal timber for distributing loads. |
| 3. | Building Trades.
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| 4. | a sleeping car. |
| 5. | Informal. something or someone that becomes unexpectedly successful or important after a period of being unnoticed, ignored, or considered unpromising or a failure: The play was the sleeper of the season. |
| 6. | merchandise that is not quickly sold because its value is not immediately recognized. |
| 7. | Often, sleepers. one-piece or two-piece pajamas with feet, esp. for children. |
| 8. | bunting 3 . |
| 9. | a sofa, chair, or other piece of furniture that is designed to open up or unfold into a bed; convertible. |
| 10. | Also called sleep, sand. a globule that forms at the inner corner of the eye, esp. during sleep, from the accumulated secretion of the glands of the eyelid. |
| 11. | any of several gobioid fishes of the family Eleotridae, of tropical seas, most species of which have the habit of resting quietly on the bottom. |
| 12. | Slang. a spy; mole. |
| 13. | Slang. a juvenile delinquent sentenced to serve more than nine months. |
| 14. | Bowling. a pin that is hidden from view by another pin. |
| 15. | Chiefly British. a timber or beam laid in a railroad track, serving as a foundation or support for the rails; tie. |
sleeper
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"Gif hwa fæmnan beswice unbeweddode, and hire mid slæpe ..." [Laws of King Alfred, c.900]Sleep around first attested 1928. Sleeping sickness as a specific African tropical disease is first recorded 1875. Sleepless is from 1412; sleepy first attested c.1225.
sleep (slēp)
n.
A natural periodic state of rest for the mind and body, in which the eyes usually close and consciousness is completely or partially lost, so that there is a decrease in bodily movement and responsiveness to external stimuli. During sleep the brain in humans and other mammals undergoes a characteristic cycle of brain-wave activity that includes intervals of dreaming. v. slept (slěpt), sleep·ing, sleeps
To be in the state of sleep.
sleep
1.
The alternative is to poll or "busy wait" for the event but this uses processing power.
Also used in the phrase "sleep on" (or "block on") some external event, meaning to wait for it.
E.g. the Unix command of the same name which pauses the current process for a given number of seconds.
2.
[The Jargon File]
(2000-09-25)
sleep
In addition to the idioms beginning with sleep, also see let sleeping dogs lie; lose sleep over; put to sleep. Also see under asleep.