Source : Webster's Revised Unabridged Dictionary (1913)

Cicerone \Ci`ce*ro"ne\, n.; pl. It. {Ciceroni}, E. {Cicerones}.
   [It., fr. L. Cicero, the Roman orator. So called from the
   ordinary talkativeness of such a guide.]
   One who shows strangers the curiosities of a place; a guide.

         Every glib and loquacious hireling who shows strangers
         about their picture galleries, palaces, and ruins, is
         termed by them [the Italians] a cicerone, or a Cicero.
                                                  --Trench.