Learn how to say Diary correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word diary:
noun (plural diaries)
a book in which one keeps a daily record of events and experiences.
British a book with spaces for each day of the year in which one notes appointments or information.
a column in a newspaper or magazine giving news or gossip on a particular topic:
the City Diary
late 16th century: from Latin diarium, from dies ‘day’
Do not confuse dairy with diary. Dairy means ‘a place for storing milk’, whereas diary means ‘a book for keeping a daily record’.