Definition of sleep noun from the Oxford Advanced Learner's Dictionary

      

    sleep

     noun
    noun
    BrE BrE//sliːp//
     
    ; NAmE NAmE//sliːp//
     
     
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  1. 1  [uncountable] the natural state of rest in which your eyes are closed, your body is not active, and your mind is not conscious I need to get some sleep. I didn't get much sleep last night. Can you give me something to help me get to sleep (= start sleeping)? Go to sleep—it's late. He cried out in his sleep. Anxiety can be caused by lack of sleep. His talk nearly sent me to sleep (= it was boring). Try to go back to sleep.
  2. 2  [singular] a period of sleep Did you have a good sleep? Ros fell into a deep sleep. I'll feel better after a good night's sleep (= a night when I sleep well).
  3. 3[uncountable] (informal) the substance that sometimes forms in the corners of your eyes after you have been sleeping Ned rubbed the sleep from his eyes.
  4. Word Origin Old English slēp, slǣp (noun), slēpan, slǣpan (verb), of Germanic origin; related to Dutch slapen and German schlafen.Extra examples Don’t lose sleep over it—we’ll sort everything out in the morning. He drifted in and out of sleep all night. He often walks and talks in his sleep. He woke from a fitful sleep with a headache. I feigned sleep when the nurse came around. I feigned sleep when the ticket inspector came round. I immediately fell into a dead sleep. I snatched a few hours’ sleep in the afternoon. I used Saturday to catch up on my sleep. I was in a deep sleep when the phone rang. I was suffering from a lack of sleep. I woke up early after a disturbed sleep. I won’t get a wink of sleep with that noise downstairs. I’m off to bed for some much-needed sleep. She turned over and went back to sleep. Sleep came to her in snatches. Sleep finally overtook me. Sorry but I need my beauty sleep. The quiet music soon sent her to sleep. They seem to survive on only a few hours’ sleep a night. Tom was in the front room sleeping the sleep of the dead. You’ll feel better after a good night’s sleep. a decreased heart rate during sleep the nation’s most commonly prescribed sleep aid the use of drugs to induce sleep Anxiety can be caused by lack of sleep. Go to sleep —it’s late. He cried out in his sleep. His talk nearly sent me to sleep. I can’t get to sleep. I didn’t get much sleep last night. I need to get some sleep. Rose fell into a deep sleep. Try to go back to sleep.Idioms
    be able to do something in your sleep
     
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    (informal) to be able to do something very easily because you have done it many times before I haven’t done many portraits, but I could paint landscapes in my sleep.
    (informal) if part of your body goes to sleep, you lose the sense of feeling in it, usually because it has been in the same position for too long My foot’s gone to sleep.
    not get/have a wink of sleep, not sleep a wink
     
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    to not be able to sleep I didn't get a wink of sleep last night. I hardly slept a wink.
    not lose sleep/lose no sleep over something
     
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    to not worry much about something It's not worth losing sleep over.
    (informal) to make somebody unconscious before an operation by using drugs (called an anaesthetic ) to kill a sick or injured animal by giving it drugs so that it dies without pain. People say put to sleep to avoid saying kill.
See the Oxford Advanced American Dictionary entry: sleep