Being without sleep; wakeful. A crown, Golden in show, is but a wreath of thorns, Brings dangers, troubles, cares, and sleepless nights. Milton, P. R., ii. 460.While pensive poets painful vigils keep, Sleepless themselves to give their readers sleep. Pope, Dunciad, i. 94.
Constantly watchful; vigilant: as, the sleepless eye of justice.
Restless; continually disturbed or agitated. Biscay's sleepless bay. Byron, Childe Harold, i. 14.I thought of Chatterton, the marvellous boy, The sleepless soul that perished in his pride. Wordsworth, Resolution and Independence, st. 7.
Then in my arms in our bed one night Olive began to weep, that the boy lay sleepless -- she knew!
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Ellery Queen Mystery Magazine
You thought about that as you tossed and rolled-sleepless, dreamless-through the night, but there were so many thoughts playing bumper cars in your brain that you hadn't more than a few seconds to spend with any particular one before it was rear-ended or broadsided by a different thought-that then took its brief turn leading the pack.
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Half Asleep in Frog Pajamas
In consequence, Brown's men were soaking wet, ill-fed, sleepless, and short-tempered.
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A Breath of Snow and Ashes
One night â” it was long after I had found out Anna's secret â” I happened to be sleepless, and I overheard Anna talking angrily to Peter.
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In Those Days
from Middle Englishsleples, from Anglo-Saxon *slǣpleás (in deriv. slǣpleást, sleeplessness) (= Dutchslapeloos = Middle Low Germanslapelōs = Old High GermanMiddle High Germanslāflōs, slāfelōs, O. schlaflos); from slǣp, sleep, + -leás, English -less.