| / English Dictionary |
SLEEPINESS
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
A very sleepy state
Example:
sleepiness causes many driving accidents
Synonyms:
drowsiness; sleepiness; somnolence
Classified under:
Nouns denoting stable states of affairs
Hypernyms ("sleepiness" is a kind of...):
temporary state (a state that continues for a limited time)
Hyponyms (each of the following is a kind of "sleepiness"):
oscitance; oscitancy (drowsiness and dullness manifested by yawning)
Antonym:
wakefulness (a temporary state in which you are unable (or unwilling) to sleep)
Derivation:
sleepy (ready to fall asleep)
Context examples:
Check with a doctor if your child has any of the following problems: • Morning headache or headache that goes away after vomiting • Frequent nausea and vomiting • Vision, hearing, and speech problems • Loss of balance or trouble walking • Unusual sleepiness • Personality changes • Seizures • Increased head size in infants
(Childhood Brain Tumors, NIH: National Cancer Institute)
A sleep disorder characterized by persistent sleep disruption (excessive sleepiness and/or insomnia) that is due to a conflict between the individual's internal sleep-wake system and the demands of his or her environment regarding the timing and duration of sleep.
(Circadian Rhythm Sleep Disorder, NCI Thesaurus)
The finding — a collaboration between UT Southwestern's Peter O'Donnell Jr. Brain Institute and two other medical centers — gives scientists a new target besides the brain to develop therapies for people with excessive sleepiness.
(Muscle, Not Brain, May Hold Answers to Some Sleep Disorders, The Titi Tudorancea Bulletin)
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