Meaning of the word "close the book on" in English

What does "close the book on" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

close the book on

US /kloʊz ðə bʊk ɑn/
UK /kləʊz ðə bʊk ɒn/
"close the book on" picture

Idiom

to stop dealing with a matter; to consider something finished

Example:
After years of investigation, the police decided to close the book on the cold case.
Let's just close the book on this argument and move on.