- an artificial language invented in 1887 by L. L. Zamenhof (1859–1917), a Polish physician and philologist, and intended for international use. It is based on word roots common to the major European languages.
- an international artificial language based on words common to the chief European languages, invented in 1887
1892, from Doktoro Esperanto, whose name means in Esperanto, “one who hopes,” pen name used on the title page of a book about the artificial would-be universal language published 1887 by its inventor, Lazarus Ludwig Zamenhof (1859-1917). Cf. Spanish esperanza “hope,” from esperar, from Latin sperare (see (n.)).