1.  female first name (form of diana); diana princess of wales (1961-1997, born lady diana spencer), member of the british royal family (1st first wife of prince charles, prince of wales) who performed much charitable work worldwide, died in a car accident in paris. prep. (ıtalian) from, of (used in names to indicate origin). pref. bi, double, twice; containing or comprised of two. aria di bravura