sleep·​less | \ ˈslēp-ləs How to pronounce sleepless (audio) \

Definition of sleepless

1 : not able to sleep lay sleepless with fever
2 : affording no sleep sleepless nights
3 : unceasingly active or operative sleepless casinos

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Other Words from sleepless

sleeplessly adverb
sleeplessness noun

Examples of sleepless in a Sentence

He lay sleepless in bed.
Recent Examples on the Web Police on the other coast, in San Francisco, are now being flooded with complaints about sleepless nights and frightened pets. Stephen Collinson With Caitlin Hu, CNN, "The world isn't laughing at America -- it's pitying us," 28 June 2020 Those hot, sleepless nights will soon become a thing of the past. Kimberly Wilson, Essence, "Summer's Here! Here's The Best Bedding To Keep You Cool All Night Long," 26 June 2020 In her first year, the sleepless nights were eternities passed under the glowing blue rectangles of an LCD clock. Popular Science, "Your kids aren’t growing up too quickly, but your brain sure thinks they are," 20 June 2020 Beyond the endless, sleepless national chyron and the drumbeat of L.A. and New York City alerts, smaller cities like Savannah, Georgia; Erie, Pennsylvania; and Greenville, South Carolina, are grappling with existential questions. USA Today, "George Floyd protests reach even small cities as America confronts systemic racism," 7 June 2020 Dumont, too, has suffered sleepless nights because of COVID-19. NBC News, "Fever, fatigue, fear: For some recovering COVID-19 patients, weeks of illness, uncertainty," 4 May 2020 Newton is girding herself for a long period of sleepless nights, making enough wigs to support everyone. Ikya Kandula,, "Black salons seemed recession proof. They’re not pandemic proof.," 1 May 2020 One mother said her son tested negative, but there have been many sleepless nights. Kristine Phillips, USA TODAY, "Isolated and scared: The plight of juveniles locked up during the coronavirus pandemic," 28 Apr. 2020 Having to navigate a substance abuse disorder during the coronavirus crisis is causing Alison Noice some sleepless nights. oregonlive, "Fallout from coronavirus for substance abuse patients could be significant, but may open new doors," 21 Apr. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sleepless.' 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 sleepless

15th century, in the meaning defined at sense 1

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Time Traveler for sleepless

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The first known use of sleepless was in the 15th century

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Statistics for sleepless

Last Updated

7 Jul 2020

Cite this Entry

“Sleepless.” Dictionary, Merriam-Webster, Accessed 10 Aug. 2020.

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More Definitions for sleepless


How to pronounce sleepless (audio)

English Language Learners Definition of sleepless

: without sleep
: not able to sleep


sleep·​less | \ ˈslē-pləs How to pronounce sleepless (audio) \

Medical Definition of sleepless

: not able to sleep : insomniac

Other Words from sleepless

sleeplessness noun

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