Meaning of “diary” in the English Dictionary

business-english dictionary

"diary" in British English

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diarynoun [ C ]

uk /ˈdaɪə.ri/ us /ˈdaɪr.i/

a book in which you record your thoughts or feelings or what has happened each day:

While in hiding, Anne Frank kept a diary.

A2 UK US datebook a book with a separate space or page for each day, in which you write down your future arrangements, meetings, etc.:

Don't forget to write/enter the date of the meeting in your diary.

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(Definition of “diary” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"diary" in American English

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diarynoun [ C ]

us /ˈdɑɪ·ə·ri, ˈdɑɪ·ri/

a person’s private record of events, thoughts, feelings, etc., that are written down every day, or a book where such things are recorded:

That's my private diary - you shouldn't be reading it.
We kept a food-and-exercise diary and measured the amount of food we ate.

(Definition of “diary” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"diary" in Business English

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diarynoun [ C ]

uk /ˈdaɪəri/ us plural diaries

UK US calendar WORKPLACE a book or piece of software with a space or page for each day, in which you record future arrangements, meetings, etc.:

in sb's diary Is there anything in your diary for tomorrow afternoon?
Please check the appointments diary before scheduling a meeting.
She has a very full diary this week but she could see you next week.

a record of what has happened during a period of time:

It may help to keep a diary of problems you encounter.
His diary entries for July describe the final stages of the project.

(Definition of “diary” from the Cambridge Business English Dictionary © Cambridge University Press)