Definition of sleepiness in English:

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sleepiness

Pronunciation: /ˈsliːpɪnəs/

noun

[mass noun]
The state of being sleepy: long road trips cause fatigue and sleepiness
More example sentences
  • They may wake up frequently at night resulting in sleepiness and fatigue during the day.
  • Daytime fatigue or sleepiness is also a risk and could make driving or operating machinery dangerous.
  • Various subjective measures of fatigue and sleepiness have been developed.
Synonyms

For editors and proofreaders

Line breaks: sleepi|ness

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