sleep

noun
\ ˈslēp How to pronounce sleep (audio) \

Definition of sleep

 (Entry 1 of 2)

1 : the natural, easily reversible periodic state of many living things that is marked by the absence of wakefulness and by the loss of consciousness of one's surroundings, is accompanied by a typical body posture (such as lying down with the eyes closed), the occurrence of dreaming, and changes in brain activity and physiological functioning, is made up of cycles of non-REM sleep and REM sleep, and is usually considered essential to the restoration and recovery of vital bodily and mental functions
2 : a state resembling sleep: such as
a : a state of torpid inactivity
b : death put a pet cat to sleep also : trance, coma
c : the closing of leaves or petals especially at night
d : a state marked by a diminution of feeling followed by tingling my foot's gone to sleep
e : the state of an animal during hibernation
3a : a period spent sleeping
b : night
c : a day's journey
4 : crusty matter present in the corner of an eye upon awakening

sleep

verb
slept\ ˈslept How to pronounce slept (audio) \; sleeping

Definition of sleep (Entry 2 of 2)

intransitive verb

1 : to rest in a state of sleep
2 : to be in a state (as of quiescence or death) resembling sleep
3 : to have sexual relations usually used with with

transitive verb

1 : to be slumbering in slept the sleep of the dead
2 : to get rid of or spend in or by sleep sleep away the hours sleep off a headache
3 : to provide sleeping accommodations for the boat sleeps six

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Other Words from sleep

Noun

sleeplike \ ˈslēp-​ˌlīk How to pronounce sleeplike (audio) \ adjective

Synonyms & Antonyms for sleep

Synonyms: Noun

bed, catnapping, dozing, napping, repose, rest, resting, shut-eye, slumber, slumbering, snoozing, z's (or zs)

Synonyms: Verb

catnap, doze, nap, rest, slumber, snooze

Antonyms: Noun

consciousness, wake, wakefulness

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Examples of sleep in a Sentence

Noun

I just need to get some sleep. How much sleep did you get last night? Her roommate talks in her sleep. The noise woke her from a deep sleep. He woke up and rubbed the sleep out of his eyes.

Verb

I couldn't sleep last night. I was awake all night long. I usually try to sleep for at least eight hours every night. Did you sleep soundly last night? We were sleeping peacefully when a sudden loud noise woke us up. I can never sleep on airplanes. The tent sleeps five adults.
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Recent Examples on the Web: Noun

Other research has focused on the importance of sleep disturbances. Kelly Servick, Science | AAAS, "Suicide attempts are hard to anticipate. A study that tracks teens’ cellphone use aims to change that," 21 Aug. 2019 For Renee Jensen of New Jersey, the only logical approach was to burn the doll, sage her property and sleep with a knife. Cady Lang, Time, "Woman's Response After a Spooky Clown Doll Appeared in Her Home Deserves Its Own Horror Film," 21 Aug. 2019 People who experience sleep paralysis usually wake up before the REM cycle is complete. Kristen Bateman, Harper's BAZAAR, "13 Common Dreams and What They Really Mean," 19 Aug. 2019 Exercise, proper nutrition, social interaction and quality sleep are each part of a productive coping strategy. Ryan Korstange, The Conversation, "5 tips for college students to avoid burnout," 19 Aug. 2019 And a San Diego company gave $5 million for the study of sleep problems. San Diego Union-Tribune, "With unexpected speed, UC San Diego raises $2 billion in donations to transform campus," 18 Aug. 2019 The sleep-away camp mixes traditional activities — swimming, nature hikes, chore charts and sloppy Joes — with Christian music and religious worship time. Manny Fernandez, New York Times, "A Summer Camp on the Border, Where the Border Crisis Feels Far Away," 17 Aug. 2019 While the original is an all-foam material, the hybrid option blends foam with springs to give you more lift and support, in addition to better airflow for a cooler sleep. Noelle Ike, CNN Underscored, "Don't snooze on this deal from Casper: Save $100 on a mattress, receive two free pillows," 16 Aug. 2019 In the past week, the FDA has approved five novel new drugs to treat a slew of conditions from cancer to the skin disease psoriasis to tuberculosis (TB) to the sleep disorder narcolepsy. Sy Mukherjee, Fortune, "The FDA Went on an Epic Drug Approval Binge This Week: Brainstorm Health," 16 Aug. 2019

Recent Examples on the Web: Verb

Roughly 30 percent of the boat will stay original, including the galley, the bathroom, or head, and the berths where Steinbeck and the others slept. Smithsonian, "John Steinbeck’s Epic Ocean Voyage Rewrote the Rules of Ecology," 22 Aug. 2019 Bowles pleaded guilty to first-degree murder in 1996 for killing Walter Hinton in Jacksonville Beach, Florida by dropping a 40-pound cement stepping stone onto his sleeping head. Eric Levenson, CNN, "Florida set to execute serial killer who targeted gays across Southeast," 22 Aug. 2019 One of the most famous looks like a sleeping baby elephant. USA Today, "Were Wanda Tucker’s ancestors America’s first slaves? A difficult search for answers in far-away Angola," 22 Aug. 2019 In the last case, another woman sleeping near the victim awoke during the attack and fought Brotherton off with her own knife, according to court records. oregonlive.com, "Suspect in 2 knifepoint Portland sex assaults now accused in 3rd case," 22 Aug. 2019 Dates of conversations, moods after pickup, sleeping patterns, eating habits, decreased interest in play or other activities that your son once enjoyed . . . Meghan Leahy, Washington Post, "After his parents’ rough divorce, why is this previously chatty 4-year-old clamming up?," 21 Aug. 2019 So this week, the San Mateo City Council unanimously approved a plan to convert a portion of an old fire station into a sleeping barracks for far-flung officers who can’t afford the average $1.4 million Peninsula home. Taylor Kate Brown, SFChronicle.com, "Bay Briefing: The cops that sleep in their cars," 21 Aug. 2019 Beautiful baby but as a pediatrician… back to sleep only… even if just for a photo shoot and people are watching. Laura Hanrahan, Woman's Day, "Jessica Simpson Was Mom-Shamed After Posting a Photo of Her 4-Month-Old In a Stroller," 15 Aug. 2019 There's truly nothing worse than sleeping next to a partner at night only to wake up finding yourself in a half-asleep tug-of-war battle for the duvet. Elizabeth Gulino, House Beautiful, "This Magnetic Duvet Was Specifically Designed For Couples With a Blanket Hogging Problem," 7 Aug. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sleep.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of sleep

Noun

before the 12th century, in the meaning defined at sense 1