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sleepless

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adjective sleep·less \ˈslēp-ləs\

Simple Definition of sleepless

  • : without sleep

  • : not able to sleep

Source: Merriam-Webster's Learner's Dictionary

Full Definition of sleepless

  1. 1 :  not able to sleep <lay sleepless with fever>

  2. 2 :  affording no sleep <sleepless nights>

  3. 3 :  unceasingly active or operative <sleepless casinos>

sleeplessly adverb
sleeplessness noun

Examples of sleepless in a sentence

  1. He lay sleepless in bed.



15th Century

First Known Use of sleepless

15th century


Medical Dictionary

sleepless

play
adjective sleep·less \ˈslē-pləs\

Medical Definition of sleepless

  1. :  not able to sleep :  insomniac

sleeplessness noun




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