blockbusterPronunciation: /ˈblɒkbʌstə/Translate blockbuster | into French | into German Definition of blockbuster noun informal a thing of great power or size, in particular a film, book, or other product that is a great commercial success: [as modifier]:a blockbuster filmOrigin: 1940s (denoting a huge aerial bomb capable of destroying a whole block of streets): from block + busterblockbuster in other Oxford dictionaries Definition of blockbuster in the US English dictionary