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megafestival
megafestival n.
Brit. 
/ˈmɛɡəˌfɛstᵻvl/
, /ˈmɛɡəˌfɛstᵻvl/U.S. /ˈmɛɡəˌfɛstəv(ə)l/
/ˈmɛɡəˌfɛstəv(ə)l/ΚΠ
1970 Daily Tel. 30 Oct. (Colour Suppl.) 23/1 Who then will mourn if there are few more free-form megafestivals? ‘There are two and a half million kids,..and they will have nowhere to go.’
1987 Courier-Mail (Brisbane) 24 Oct. 5/1 (heading) Forget arts festival, it's a megafestival.
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