Standard Lemma guide

hypersomnia

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

Excessive sleepiness.

Definition source: English Wiktionary via Wiktextract

Usage: countable, uncountable

Topics: medicine, pathology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

an inability to stay awake

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: insomnia

Broader terms: sleep disorder

Narrower terms: catalepsy, narcolepsy

History

Etymology

No etymology was provided for this word.

Across languages

Translations

16 source translations are retained for this English entry.

  • Chinese Mandarin: 嗜睡症 (shìshuìzhèng) — a state of drowsiness or sleepiness
  • Finnish: hypersomnia — a state of drowsiness or sleepiness
  • Finnish: liikaunisuus — a state of drowsiness or sleepiness
  • French: hypersomnie — a state of drowsiness or sleepiness
  • German: Schlafsucht — a state of drowsiness or sleepiness
  • German: Hypersomnie — a state of drowsiness or sleepiness
  • Greek: υπερυπνία (yperypnía) — a state of drowsiness or sleepiness
  • Italian: ipersonnia — a state of drowsiness or sleepiness
  • Japanese: 過眠症 (kaminshō) — a state of drowsiness or sleepiness
  • Kazakh: ұйқышылық (ūiqyşylyq) — a state of drowsiness or sleepiness
  • Korean: 과다수면 (gwadasumyeon) — a state of drowsiness or sleepiness
  • Romanian: hipersomnie — a state of drowsiness or sleepiness
  • Russian: гиперсо́мния (gipersómnija) — a state of drowsiness or sleepiness
  • Russian: сонли́вость (sonlívostʹ) — a state of drowsiness or sleepiness
  • Spanish: hipersomnia — a state of drowsiness or sleepiness
  • Ukrainian: гіперсомнія (hipersomnija) — a state of drowsiness or sleepiness