Definition of keep a diary
- She kept a diary while she was traveling in Europe.
: to retain in one's possession or power
: to refrain from granting, giving, or allowing
: to have in control
: the means or provisions by which one is kept
: one that keeps or protects: such as
: fortress, castle
: a record of events, transactions, or observations kept daily or at frequent intervals : journal
: a book intended or used for a diary
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