di·​a·​ry | \ ˈdī-(ə-)rē How to pronounce diary (audio) \
plural diaries

Definition of diary

1 : a record of events, transactions, or observations kept daily or at frequent intervals : journal especially : a daily record of personal activities, reflections, or feelings
2 : a book intended or used for a diary

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Synonyms for diary


daybook, journal

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Examples of diary in a Sentence

has diligently kept a diary since she was 15

Recent Examples on the Web

From the December 30, 1979, entry in his diary, which was released in May by the George Washington University National Security Archive. Anatoly Chernyaev, Harper's magazine, "Cogs of War," 19 Aug. 2019 In his diary, Beale also documented the precise coordinates of each of the party’s campsites along their route. Katherine Cusumano, Outside Online, "The Forgotten History Behind ‘Inland’," 18 Aug. 2019 William Gladstone mentioned him in his diary 125 times. The Economist, "A new biography of Walter Bagehot, “the greatest Victorian”," 8 Aug. 2019 Sleep diaries and wristwatches that measured sleep revealed that the kiwi eaters fell asleep over 35% faster, slept more soundly, and experienced a 13.4% increase in total sleep time. Cynthia Sass, Mph, Health.com, "7 Healthy Late-Night Snacks," 3 July 2019 Items include passports, diaries, letters, postcards, pictures, newspaper clippings, clothing, toys, everyday household items and emigration documents. Catie Wegman, sun-sentinel.com, "Families donate Holocaust artifacts in 'race against time’," 26 June 2019 Here’s a running diary of some of the remaining plays from the first unit: The Eagles spent most of the first half of practice working on their two-minute drill. Jeff Mclane, https://www.inquirer.com, "Eagles Practice Observations: J.J. Arcega-Whiteside shines in the red zone; Sidney Jones caps solid OTAs with an INT; Malik Jackson arrives," 5 June 2019 That’s because Wainwright, who grew up near Lister’s one-time home, has spent years studying Lister and even went so far as cracking the secret code the woman used to write in her diaries in order to adapt them. Adam Rathe, Town & Country, "Gentleman Jack Creator Sally Wainwright on the Secret Code in Anne Lister’s Diaries," 30 Apr. 2019 Lazarus shared his favorite moments of Get Lost 2018 with Billboard Dance in the form of a photo diary. Kat Bein, Billboard, "Damian Lazarus Was Our Guide Through Get Lost Miami 2018: See the Photos," 5 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'diary.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of diary

1581, in the meaning defined at sense 1

History and Etymology for diary

Latin diarium, from dies day — more at deity

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Statistics for diary

Last Updated

27 Aug 2019

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Time Traveler for diary

The first known use of diary was in 1581

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English Language Learners Definition of diary

: a book in which you write down your personal experiences and thoughts each day


di·​a·​ry | \ ˈdī-ə-rē How to pronounce diary (audio) , ˈdī-rē\
plural diaries

Kids Definition of diary

1 : a daily written record especially of personal experiences and thoughts
2 : a book for keeping a record of experiences and thoughts

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More from Merriam-Webster on diary

Rhyming Dictionary: Words that rhyme with diary

Thesaurus: All synonyms and antonyms for diary

Spanish Central: Translation of diary

Nglish: Translation of diary for Spanish Speakers

Britannica English: Translation of diary for Arabic Speakers

Britannica.com: Encyclopedia article about diary

Comments on diary

What made you want to look up diary? Please tell us where you read or heard it (including the quote, if possible).


recurring in steady succession

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