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Definition diary in British English

diary noun

[countable] noun
/ˈdaɪəri/
1

a book in which you write your experiences each day

Example

She's kept a diary since she was twelve.

Synonyms and related words
2

a book that has spaces for each day of the year, where you can make a note of things you plan to do. The usual American word is appointment book or datebook

Example

a pocket/desk diary

Synonyms and related words
Definition diary in British English