La Vortaro has use dictionary
La Vortaro (The Dictionary) is an Esperanto dictionary, created by Bernard Vivier.
La Vortaro is partner of the FREELANG Dictionary project with more than 130 languages with a free software for utilization.Dictionary modules
Like the FREELANG dictionary, various language modules make up the core of the La Vortaro dictionary. Language modules may be accessed through the off-line FREELANG/La Vortaro dictionary program. The off-line dictionary program is currently available only for Microsoft Windows.