Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “diary”

diary

noun [C]    /ˈdɑɪ·ə·ri, ˈdɑɪ·ri/
a person’s private record of events, thoughts, feelings, etc., that are written down every day, or a book where such things are recorded: That's my private diary - you shouldn't be reading it. We kept a food-and-exercise diary and measured the amount of food we ate.
(Definition of diary noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
Focus on the pronunciation of diary

Definitions of “diary” in other dictionaries

Word of the Day

handout

a document given to students or reporters which contains information about a particular subject

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More