sleeping sickness From WikiWord, the free dictionary English Contents DefinitionsRelated wordsReferences DefinitionsnounAny of several diseases of which lethargy is a major symptom: Related wordsSynonymsAfrican trypanosomiasisnegro lethargysleepy distempersleepy sicknessencephalitis lethargicaepidemic encephalitislethargic encephalitisafrican lethargylethargyafrican sleeping sicknesssleep disordernarcolepsyafrican trypanosomiasissomnopathysleep terroragrypnocomaparasomnia References Wiktionary — sleeping sickness Wikipedia — sleeping sickness