sleepless

adjective sleep·less \ ˈslēp-ləs \

|Updated on: 26 Jul 2018

Examples: sleepless in a Sentence

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

—

sleeplessly

adverb

—

sleeplessness

noun

See sleepless defined for English-language learners

See sleepless defined for kids

Examples of sleepless in a Sentence

He lay sleepless in bed.

Recent Examples of sleepless from the Web

According to the study, people in Montana are the first to experience their sleepless night, with that combination of factors peaking on July 5.

— weldon b. johnson, azcentral, "Sleepless in Arizona? It's that time of year," 13 July 2018
The lawyers will argue that the children should be reunified with their parents on the basis of due process and the fact that keeping the children from their families is causing them mental anguish, sleepless nights and PTSD.

— kathleen mcwilliams, courant.com, "Court To Hear Arguments In Case Of Two Children Held In Connecticut Separated From Their Parents At The Border," 11 July 2018
The journey took weeks, with detours and sleepless nights.

— camila russo, Bloomberg.com, "These Are America’s White-Collar Dreamers," 9 July 2018
Actually, a few practice sleepless nights might not be a bad idea considering Isner and his wife, Madi, are expecting their first child, a daughter, at the end of September.

— sandra harwitt, USA TODAY, "USA's John Isner hopes to break third-round curse at Wimbledon," 5 July 2018
Prescott Fire has the thing for you' Five years have passed since that sleepless night.

— alden woods, azcentral, "Granite Mountain Hotshots: Five years on, Dustin DeFord's family finds peace in faith," 29 June 2018
That annoying, sleepless night led Agarwal to wonder just how the droplets produce that particular sound.

— jason daley, Smithsonian, "The Physics Behind a Leaky Faucet’s Maddening ‘Plink’," 25 June 2018
Following a sleepless night (too much adrenaline) and a few hours of early morning photos Monday, Power addressed the media and explained those shouts weren't for his competitors.

— jim ayello, Indianapolis Star, "Will Power popular Indy 500 winner among IndyCar veterans," 28 May 2018
The suit also says the five teens have suffered severe emotional distress, shock, horror and psychological trauma, as well as sleepless nights, nausea and headaches as a result.

— uriel j. garcia, azcentral, "Civil suit claims Hamilton High coach knew about sexual abuse between players," 16 May 2018

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.

First Known Use of sleepless

15th century

in the meaning defined at sense 1

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sleepless Synonyms

SLEEPLESS Defined for English Language Learners

sleepless

adjective

Definition of sleepless for English Language Learners

: without sleep
: not able to sleep

Medical Dictionary

sleepless

adjective sleep·less \ ˈslē-pləs \

medical Definition of sleepless

: not able to sleep : insomniac

—

sleeplessness

noun

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sleepless

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sleeplessly

sleeplessness

Examples of sleepless in a Sentence

Recent Examples of sleepless from the Web

First Known Use of sleepless

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SLEEPLESS Defined for English Language Learners

sleepless

Definition of sleepless for English Language Learners

Medical Dictionary

sleepless

medical Definition of sleepless

sleeplessness

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