diary
nounUK /ˈdaɪəri/
US /ˈdaɪəri/
A book where you write about what happens in your life each day.
She writes in her diary every night before bed.
OTHER MEANINGS
2. A book with spaces for each day of the year, used to note appointments and events.
He checked his diary to see when the meeting was.
3. A personal record of daily events and thoughts kept over time.
Her diary from her teenage years is full of funny stories.
4. A written account of a journey or important experience.
The explorer kept a diary of his trip across the desert.