Definition of sleepless adjective from the Oxford Advanced American Dictionary

     

    sleepless

     adjective
    adjective
    NAmE//ˈslipləs//
     
     
    jump to other results
  1. 1[only before noun] without sleep I've had a few sleepless nights recently.
  2. 2[not before noun] not able to sleep She lay sleepless until dawn.
sleeplessly
 
jump to other results
 
adverb
sleeplessness
 
jump to other results
 
noun [uncountable] synonym insomnia to suffer from sleeplessness
See the Oxford Advanced Learner's Dictionary entry: sleepless