eau de cologneEnglishOxford New American Dictionaryeau de cologne /ˌō də kəˈlōn, ˌoʊ də kəˈloʊn / ▸ noun a toilet water with a strong, characteristic scent, originally made in Cologne, Germany: the drenching smell of eau de cologne. – ORIGIN early 19th century: French, literally ‘water of Cologne’.