- unable to sleep; wakeful; restless
- marked by absence of sleep: a sleepless night
- constantly moving, active, or alert
- a. Marked by a lack of sleep: a sleepless night.b. Unable to sleep.
- Always alert or active; never resting: a sleepless district of the city.
(comparative more sleepless, superlative most sleepless)
sleep +"Ž -less