What is the meaning of "blockbuster (movie / novel etc.)" ?
The latest Hollywood blockbuster is making a lot of money.

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A blockbuster is a Hollywood movie that is produced with a huge budget and very famous actors. They are usually released in the summer and become very popular.

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a book or film that is very successful:
- a blockbuster movie/novel
- We all felt the movie was a potential blockbuster.
Cambridge Dictionary