Definition of open book in English:

open book

Syllabification: o·pen book


  • A person or thing that is easily understood or interpreted: my life’s an open book
    More example sentences
    • From your social causes to cute pet photos, your life is a open book.
    • Harvey Pekar's life is an open book, and an illustrated one at that.
    • Tonight, her life has been an open book and a tabloid target, a rare interview with Melanie Griffith.

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
(in science fiction) navigation in outer space