Phrase guide

sleeping sickness

noun · 5 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

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • slē′pĭng sĭk′nĭs
  • /ˈsliːpɪŋ ˈsɪknɪs/
  • Southern-England: Recorded audio is listed in the source snapshot.

1

noun

Meaning 1

Any of several diseases of which lethargy is a major symptom:

Especially, African sleeping sickness, an endemic infectious disease of humans and animals in tropical Africa, caused by a parasitic trypanosome.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Topics: medicine, pathology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

Any of several diseases of which lethargy is a major symptom:

Animal trypanosomiasis.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Topics: medicine, pathology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

Any of several diseases of which lethargy is a major symptom:

Eastern equine encephalitis, caused by a zoonotic alphavirus and arbovirus present in North, Central and South America and the Caribbean.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Topics: medicine, pathology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

4

noun

Meaning 4

Any of several diseases of which lethargy is a major symptom:

Encephalitis lethargica, a form of encephalitis, of unknown cause, that swept the world in the 1920s.

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Topics: medicine, pathology, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

5

noun

Meaning 5

an encephalitis that was epidemic between 1915 and 1926; symptoms include paralysis of the extrinsic eye muscle and extreme muscular weakness

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: sleepy sickness, epidemic encephalitis, lethargic encephalitis, encephalitis lethargica

Antonyms: none provided

Broader terms: encephalitis, cephalitis, phrenitis

History

Etymology

No etymology was provided for this word.

Across languages

Translations

14 source translations are retained for this English entry.

  • Chinese Mandarin: 昏睡病 (hūnshuìbìng) — infectious disease
  • Dutch: slaapziekte — infectious disease
  • Esperanto: dormomalsano — infectious disease
  • Finnish: unitauti — infectious disease
  • French: maladie du sommeil — infectious disease
  • German: Schlafkrankheit — infectious disease
  • Hungarian: álomkór — infectious disease
  • Polish: śpiączka afrykańska — infectious disease
  • Portuguese: doença do sono — infectious disease
  • Romanian: boala somnului — infectious disease
  • Russian: со́нная боле́знь (sónnaja boléznʹ) — infectious disease
  • Spanish: enfermedad del sueño — infectious disease
  • Swahili: malale — infectious disease
  • Ukrainian: со́нна хворо́ба (sónna xvoróba) — infectious disease