HYPERSOMNIA

Pronunciation (US):

(GB):

 Dictionary entry overview: What does hypersomnia mean? 

• HYPERSOMNIA (noun)
  The noun HYPERSOMNIA has 1 sense:

1. an inability to stay awake

  Familiarity information: HYPERSOMNIA used as a noun is very rare.

 Dictionary entry details 

• HYPERSOMNIA (noun)

Sense 1

Meaning:

An inability to stay awake

Classified under:

Nouns denoting stable states of affairs

Hypernyms ("hypersomnia" is a kind of...):

sleep disorder (a disturbance of the normal sleep pattern)

Hyponyms (each of the following is a kind of "hypersomnia"):

catalepsy (a trancelike state with loss of voluntary motion and failure to react to stimuli)

narcolepsy (a sleep disorder characterized by sudden and uncontrollable episodes of deep sleep)

Antonym:

insomnia (an inability to sleep; chronic sleeplessness)

 Context examples 

Clinical signs include snoring, insomnia or hypersomnia, difficulty concentrating and fatigue.

(Central Sleep Apnea Syndrome, NCI Thesaurus)

During periods of depressed mood, at least 2 of the following additional symptoms are present: poor appetite or overeating, insomnia or hypersomnia, low energy or fatigue, low self esteem, poor concentration or difficulty making decisions, and feelings of hopelessness.

(Dysthymic Disorder, NLM, Medical Subject Headings)