Sleeplessness

noun

noun ·Uncommon ·Advanced level

Definitions

Noun
  1. 1
    Lack of sleep; the property of being sleepless; the inability to sleep, insomnia. uncountable, usually
  2. 2
    a temporary state in which you are unable (or unwilling) to sleep wordnet

Synonyms

All synonyms
wakefulnessacuityacutenessagilityalertnessall-night vigil

Example

More examples

"People who regularly work in the open air do not suffer from sleeplessness."

Etymology

From sleepless + -ness.

More for "sleeplessness"

SynonymsSentencesPronunciationTranslate

Next best steps

Find stronger synonymsSee usage examplesCheck pronunciationBrowse writing guides

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.