close the book on

== English == === Etymology === By analogy to closing an accounting journal. === Verb === close the book on (third-person singular simple present closes the book on, present participle closing the book on, simple past and past participle closed the book on) (idiomatic) To stop worrying about or trying to do something about; to ignore. (idiomatic) To finish; to bring to an end. ==== Usage notes ==== Not to be confused with close the books.