diary - definition and synonyms

noun [countable] 

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  1. 1
    a book in which you write your experiences each day
    keep a diary:

    She’s kept a diary since she was twelve.

  2. 2
    British 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

    a pocket/desk diary