open book
Something whose salient aspects are obvious or easily interpreted.
Meaning adapted from Wiktionary, available under CC BY-SA 4.0.
“He is an open book, so you always know his thoughts.”
“Because she is such an open book, her friends can tell immediately when something is bothering her.”
“Despite his attempts to maintain a stoic facade, his expressive face made him an open book to anyone who cared to observe him closely.”
- 01
bad books
Disfavor.
- 02
balance the books
To add up all the debits and credits.
- 03
blot one's copy book
To damage one's own reputation through bad behavior.
- 04
book burning
Any mass destruction, removal, or recalling of books, motion pictures, broadcasts, or electronic works as a form of censorship, especially motivated by religious or political objections to the material.
- 05
book dumping
The practice of donating old used books that burden rather than assist communities.
- 06
book in
To check in (to a hotel).
- 07
call someone every name in the book
To call someone many abusive names.
- 08
close the book on
To stop worrying about or trying to do something about; to ignore.
Last updated August 10, 2026