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Webster 1913 Edition

Sleepless

Sleep′less

,
Adj.
1.
Having no sleep; wakeful.
2.
Having no rest; perpetually agitated.
“Biscay’s sleepless bay.”
Byron.
–
Sleep′less-ly
,
adv.
–
Sleep′less-ness
,
Noun.

Webster 1828 Edition

Sleepless

SLEE'PLESS

,
Adj.
1.
Having no sleep; without sleep; wakeful.
2.
Having no rest; perpetually agitated; as Biscay's sleepless bay.

Definition 2025

sleepless

sleepless

English

Adjective

sleepless ‎(comparative more sleepless, superlative most sleepless)

  1. Characterized by an absence of sleep.
    I spent a sleepless night worrying about the exams.

Derived terms

Translations

Etymology

sleep +‎ -less

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