n. [ Extravagance with an Italian ending: cf. It. stravaganza. ] 1. A composition, as in music, or in the drama, designed to produce effect by its wild irregularity; esp., a musical caricature. [ 1913 Webster ]
2. An extravagant flight of sentiment or language. [ 1913 Webster ]
3. a lavish or spectacular show or event, or presentation; as, Disney staged an extravaganza in Central Park that drew many thousands. [ PJC ]