open book definition, meaning - what is open book in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “open book”

open book

noun uk   us  
be an open book If someone is an open book, it is easy to know what they are thinking and feeling.
(Definition of open book from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of open book?
Add Cambridge dictionaries to your browser to your website

Word of the Day

prime time

in television and radio broadcasting, the time when the largest number of people are watching or listening

Word of the Day

The language of elections

by Liz Walter,
April 22, 2015
On May 7th, citizens of the UK will be going to the polls (having an election) to decide who will form the next government. This kind of election is known as a general election. The country is divided into 650 areas, called constituencies. Each constituency elects a member of parliament (MP) to

Read More 

e-juice noun

April 27, 2015
the liquid content in an e-cigarette, which includes nicotine and may be flavoured in various ways Cannabidiol oil that comes from industrial hemp plants, which is what is infused into our e-juice, is 100 per cent legal.

Read More