a daily record, usually private, especially of the writer's own experiences, observations, feelings, attitudes, etc.
a book for keeping such a record.
a book or pad containing pages marked and arranged in calendar order, in which to note appointments and the like.
- dairy, diary
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use diary in a sentence
Like an undercover operative, Graham Greene mined his diaries, letters and interviews with misinformation to foil literary snoops.The dramatic — and embellished — life of Graham Greene | Michael Mewshaw | January 15, 2021 | Washington Post
There are other methods of teasing out social connectivity beyond diaries and cellphone data.
There are other methods of teasing out social connectivity beyond diaries and cell-phone data.
All along, she has made videos at home, which feel like a diary of her pain and endurance.11 compelling documentaries to watch for this fall | Alissa Wilkinson | October 9, 2020 | Vox
A nice notebook or diary is a great gift for just about anyone.
Her experiences are recorded in a prison diary in which she has visions that have significance for the whole community.First Anglican Woman Bishop A Return to Christian Roots | Candida Moss | December 18, 2014 | THE DAILY BEAST
She and her family arrived in Lebanon on Oct. 17, 2012, at 1:34 p.m.—she marked it in her diary.
Here, again, Angleton comes into the picture: In exchange for the diary, he promised Ben and Tony, he would destroy it.The Bizarre Tale of Ben Bradlee, JFK, and the Master Spy | Will Rahn | October 22, 2014 | THE DAILY BEAST
In Berlin, Princess Blucher wrote in her diary, “Nothing is talked of but the expected entry into Paris.”Barbara Tuchman’s ‘The Guns of August’ Is Still WWI’s Peerless Chronicle | James A. Warren | September 29, 2014 | THE DAILY BEAST
In his new book, ‘OZ diary,’ Zahm explores 10 years of his life and art.
My memory is well stored, but unfortunately I have never kept a diary or commonplace book of any kind.Fifty Years of Railway Life in England, Scotland and Ireland | Joseph Tatlow
Confiding these matters to his "diary" and keeping his own opinion, Mr. Adams passed on to Philadelphia.The Eve of the Revolution | Carl Becker
This was noticeable in many ways, among others his passion for keeping a diary.The Life & Letters of Peter Ilich Tchaikovsky | Modeste Tchaikovsky
About the close of the seventies Tchaikovsky started a new diary, which he kept for about ten years.The Life & Letters of Peter Ilich Tchaikovsky | Modeste Tchaikovsky
Things which he never had set down in his diary—things which he did not tell to any one save his few friends.Cabin Fever | B. M. Bower
British Dictionary definitions for diary
a personal record of daily events, appointments, observations, etc
a book for keeping such a record
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012