extravaganza
Concise Oxford English Dictionary © 2008 Oxford University Press:
extravaganza /ɪkˌstravəˈganzə, ɛk-/
▶noun an elaborate and spectacular entertainment.
– origin C18 (in the sense ‘extravagance in language or behaviour’): from Ital. estravaganza ‘extravagance’.
'extravaganza' also found in these Oxford entries:

