UK [ˈsliːpləs] / US [ˈslɪpləs] adjective
without sleep, or unable to sleep

He had been lying sleepless most of the night.

a sleepless night:

They spent a sleepless night waiting for her to call.

Derived words:
noun uncountable

English dictionary. 2014.

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  • Sleepless — may refer to:In film and television: * Sleepless (2001 film), a horror film by Dario Argento * La Anam ( Sleepless ), an Egyptian film ** La Anam (novel), an Arabic novel by Ihsan Abdel Quddous, basis for the film * Sleepless ( The X Files ), an… …   Wikipedia

  • Sleepless — Sleep less, a. 1. Having no sleep; wakeful. [1913 Webster] 2. Having no rest; perpetually agitated. Biscay s sleepless bay. Byron. [1913 Webster] {Sleep less*ly}, adv. {Sleep less*ness}, n. [1913 Webster] …   The Collaborative International Dictionary of English

  • sleepless — [slēp′lis] adj. 1. unable to sleep; wakeful; restless 2. marked by absence of sleep [a sleepless night] 3. constantly moving, active, or alert sleeplessly adv. sleeplessness n …   English World dictionary

  • sleepless — index industrious Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • sleepless — early 15c., from SLEEP (Cf. sleep) (n.) + LESS (Cf. less). Related: Sleeplessly; sleeplessness …   Etymology dictionary

  • sleepless — [adj] insomniac, restless active, alert, antsy*, anxious, bustling, edgy, fidgeting, fidgety, jumpy, nervous, on edge, strung out*, tossing and turning*, troubled, unsettled, wakeful, wide awake, wired*, worried; concepts 403,542,584 …   New thesaurus

  • Sleepless — Filmdaten Deutscher Titel Sleepless Originaltitel Non ho sonno Produktions …   Deutsch Wikipedia

  • sleepless — [[t]sli͟ːpləs[/t]] 1) ADJ GRADED: usu ADJ n A sleepless night is one during which you do not sleep. I have sleepless nights worrying about her. 2) ADJ Someone who is sleepless is unable to sleep. A sleepless baby can seem to bring little reward.… …   English dictionary

  • sleepless — adjective Date: 15th century 1. not able to sleep < lay sleepless with fever > 2. affording no sleep < sleepless nights > 3. unceasingly active or operative < sleepless casinos > • sleeplessly adverb • sleeplessness …   New Collegiate Dictionary

  • sleepless — sleeplessly, adv. sleeplessness, n. /sleep lis/, adj. 1. without sleep: a sleepless night. 2. watchful; alert: sleepless devotion to duty. 3. always active: the sleepless ocean. [1375 1425; late ME; see SLEEP, LESS] * * * …   Universalium

  • sleepless — sleep|less [ˈsli:pləs] adj 1.) a sleepless night a night when you are unable to sleep ▪ Adrian spent a sleepless night wondering what to do. 2.) unable to sleep ▪ She lay sleepless for hours, worrying. >sleeplessly adv >sleeplessness n [U] …   Dictionary of contemporary English

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