Definition of blockbuster in English:

blockbuster

Line breaks: block|bust¦er
Pronunciation: /ˈblɒkbʌstə
 
/

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 film
    More example sentences
    • They elect presidents and make films into blockbusters and books into bestsellers.
    • I have done a whole body of work - classy blockbusters, completely commercial films and art movies.
    • It's really easy to write a mainstream pop song, a bestselling novel, a blockbuster film…

Origin

1940s (denoting a huge aerial bomb capable of destroying a whole block of streets): from block + buster.

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