- noun a description of what has happened in your life day by day
- noun a small book in which you write notes or make appointments for each day of the week
Information & Library Science
- noun a detailed daily record of the events in a person’s life written in a book
- noun a small book with dates and blank spaces used to record appointments
- noun a book in which you can write notes or appointments for each day of the week and record events which have taken place
Origin & History of “diary”
like its semantic cousin journal, a diary is literally a ‘daily’ record. It comes from Latin diarium, a derivative of diēs ‘day’. Originally in classical Latin the word meant ‘daily allowance of food or pay’, and only subsequently came to be applied to a ‘record of daily events’. From the 17th to the 19th century English also had an adjective diary, from Latin diarius, meaning ‘lasting for one day’.