Usage examples for sleepless:

• Frazier had a sleepless night of it. "A Trooper Galahad" – Charles King

• All sick men's sleep, we know, Hath open eye; Their quickly ruffling mind Quivers in lightest wind, Sleepless in slumber new danger to spy. "The Seven Plays in English Verse" – Sophocles

• His nights were sleepless and there were scarcely any intervals of ease or improvement. "Daniel Webster" – Henry Cabot Lodge

• After having waited for Daniel all the evening of the day before, and after having spent a sleepless night, she had surely expected him to- day, counting the seconds by the beating of her heart, and starting at the noise of every carriage in the street. "The Clique of Gold" – Emile Gaboriau