1. an artificial language devised in 1887 as an international medium of communication, based on roots from the chief European languages.
Word Originlate 19th century: from the name Dr Esperanto, used as a pen name by the inventor of the language, Ludwik L. Zamenhof (1858–1917), Polish physician; the literal sense is ‘one who hopes’ (based on Latin sperare ‘to hope’).