1. Easily rolling or turning; easily set in motion; apt to roll; rotating; as, voluble particles of matter.
2. Moving with ease and smoothness in uttering words; of rapid speech; nimble in speaking; glib; as, a flippant, voluble, tongue. Cassio a knave very voluble. (Shak)
Voluble was used formerly to indicate readiness of speech merely, without any derogatory suggestion. A grave and voluble eloquence.
3. Changeable; unstable; fickle.
4. (Science: botany) Having the power or habit of turning or twining; as, the voluble stem of hop plants.
(Science: botany) Voluble stem, a stem that climbs by winding, or twining, round another body. Volubleness, Volubly.
Origin: L. Volubilis, fr. Volvere, volutum, to roll, to turn round; akin to Gr. To infold, to inwrap, to roll, G. Welle a wave: cf. F. Voluble. Cf. F. Well of water, Convolvulus, Devolve, Involve, Revolt, Vault an arch, Volume, Volute.