open book

== English == === Pronunciation === === Noun === open book (plural open books) (idiomatic) Something whose salient aspects are obvious or easily interpreted. 2009, May 21, Barack Obama, speech, Protecting Our Security and Our Values But I have never argued – and never will – that our most sensitive national security matters should be an open book. (idiomatic) A person who through naivete responds candidly to questions or openly displays their emotions or intentions. (mathematics, topology) An open book decomposition. (climbing) An inside angle in the rock. ==== Synonyms ==== (person who is candid): one who wears one's heart on one's sleeve ==== Antonyms ==== (antonym(s) of “person who is candid”): closed book ==== Related terms ==== open-book contract ==== Translations ==== ==== See also ==== en clair open publication: open access book (e.g., open-access monograph) open secret wear one's heart on one's sleeve ==== Further reading ==== open book on Wikipedia.Wikipedia