Definition of diary noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈdaɪəri//
    ; NAmE NAmE//ˈdaɪəri//
    (pl. diaries) In the office, Office life
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  1. 1  (British English) (North American English datebook) a book with spaces for each day of the year in which you can write down things you have to do in the future a desk diary I'll make a note of our next meeting in my diary. See related entries: In the office, Office life
  2. 2  a book in which you can write down the experiences you have each day, your private thoughts, etc. Do you keep a diary (= write one regularly)? The writer's letters and diaries are being published next year. see also journal, video diary Which Word?agenda / diary / schedule / timetable A book with a space for each day where you write down things that you have to do in the future is called a diary or a datebook (North American English) (not an agenda). You may also have a calendar on your desk or hanging up in your room, where you write down your appointments. A diary or a journal is also the record that some people keep of what has happened during the day:The Diary of Anne Frank. In British English your schedule is a plan that lists all the work that you have to do and when you must do each thing and a timetable is a list showing the fixed times at which events will happen:a bus/​train timetable. In North American English these are both called a schedule.
  3. Word Originlate 16th cent.: from Latin diarium, from dies ‘day’.Extra examples ‘It’s all over,’ he wrote in his diary for April 21. He jotted down observations on the animals’ habits in his field diary. I didn’t have the meeting in my diary. I starting keeping a diary when I was thirteen. I’ve made a note in my diary. No one is allowed to read my diary. Put it in your diary before you forget. His letters and diaries are to be published next year. I keep a desk diary for business appointments. I used to keep a secret diary when I was a teenager. I’ll just make a note of that date in my diary. I’m afraid my diary is full for this week, but I could see you next Monday. Put the date of the meeting in the diary, would you, Bob? She writes her thoughts down in her personal diary every night. The captain recorded in his diary that food supplies were running low. The play is based on the diary of Anne Frank. This was the very last entry in her diary.
See the Oxford Advanced American Dictionary entry: diary