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 Even with the sleepless nights and sometimes mischievous behaviors, the rewards of adopting a dog are so worth it — chewed up shoes, accidents and all. Traci Howerton,, "Bringing home a new puppy can be a challenge, but it's one that's full of joy," 17 Dec. 2020 But this bad habit has given me many sleepless nights due to neck pain and backaches. Amanda Tarlton, USA TODAY, "12 things our editors bought last winter that helped us survive quarantine," 14 Dec. 2020 Jennifer and Jason Gonzalez had countless discussions and sleepless nights over whether to return their children, Joaquin, 6, and Javier, 3, to St. Mary Magdalen School in the Los Angeles Heights neighborhood. Krista Torralva,, "Amid COVID surge, San Antonio students pour back into some campuses, abandon others," 7 Dec. 2020 There were sleepless nights as the chairman equivocated. Star Tribune, "Patrick Reusse's annual Turkey of the Year was done. But then 2020 happened ...," 25 Nov. 2020 There were a lot of sleepless nights for the coaches who are participating in the state finals this weekend. Kyle Neddenriep, The Indianapolis Star, "Through quarantines and sleepless nights, coaches at state finals thankful season gets championship finish," 26 Nov. 2020 Jason Stephens remembers the hunger pains and sleepless nights following his release from jail in 2015. Shafi Musaddique, The Christian Science Monitor, "Soccer star leads an awakening on child hunger in Britain," 23 Nov. 2020 Or in Atlanta, where Richard Barron, the head of the Fulton County election office, announced Thursday that his staff was just about done counting votes after two sleepless nights and a deluge of international media attention. Washington Post, "Local campaign officials are becoming election-week celebrities. They’re too busy to notice.," 6 Nov. 2020 The drives to towns like Port Huron or Lexington to watch the sunrise over the lake to take the edge off her sleepless nights. Susan Tompor, Detroit Free Press, "Michigan's jobless wonder when the economic intermission will end," 16 Oct. 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

22 Dec 2020

Cite this Entry

“Sleepless.” Dictionary, Merriam-Webster, Accessed 22 Jan. 2021.

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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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