Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “diary”

See all translations

diary

noun [C] uk   /ˈdaɪə.ri/ us    /ˈdaɪr.i/
a book in which you record your thoughts or feelings or what has happened each day: While in hiding, Anne Frank kept a diary.A2 UK ( US datebook) a book with a separate space or page for each day, in which you write down your future arrangements, meetings, etc.: Don't forget to write/enter the date of the meeting in your diary.
More examples
(Definition of diary from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
What is the pronunciation of diary?
Add Cambridge dictionaries to your browser to your website

Definitions of “diary” in other dictionaries

Word of the Day

escapism

a way of avoiding an unpleasant or boring life, especially by thinking, reading, etc. about more exciting but impossible activities

Word of the Day

Lies, lies, lies!

by Kate Woodford,
February 25, 2015
​​​ According to sociologists (=people who study the relationships between people living in groups), we are good at lying. As a species, we have developed a remarkable ability to deceive each other (= persuade each other that something false is true). Being able to say things that are not true can help with

Read More 

showrooming noun

February 23, 2015
the activity of examining a product in a physical store and then making the purchase with an online retailer Amazon’s new smartphone is specifically designed to make showrooming fast and easy.

Read More