close the book on something - definition and synonyms

  1. 1
    to end something unpleasant that has been continuing for a long time

    It’s time to close the book on this unfortunate period in our history.

  2. 2
    to stop working on something because you do not believe that you will achieve your aim

    It can be difficult to close the book on something you’ve worked on for so long.

See also main entry: close