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Definition of sleepless adjective from the Oxford Advanced Learner's Dictionary

sleepless

adjective
 
/ˈsliːpləs/
 
/ˈsliːpləs/
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  1. [only before noun] without sleep
    • I've had a few sleepless nights recently.
  2. [not before noun] not able to sleep
    • She lay sleepless until dawn.
See sleepless in the Oxford Advanced American Dictionary
ripple effect
noun
 
 
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