diary

noun

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

Examples of diary in a Sentence

has diligently kept a diary since she was 15
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This week’s event saw plenty of talk of how to navigate the many challenges facing the TV biz, but affairs at NEM were conducted with some style, with a diary of cocktails and events taking place against a stunning Croatian backdrop. Max Goldbart, Deadline, 13 June 2025 Her baguettes, her diary, her keys and her daughter Charlotte’s baby bottles overflowed from the rigid, hefty and only somewhat practical container. Eli Wizevich, Smithsonian Magazine, 11 June 2025 Listening to it was like reading her diary—the kind of authenticity that has made Swift’s fans feel so close to her. Tyler Foggatt, New Yorker, 8 June 2025 As if this weren’t enough reason to swoon and write about your crush in your diary, Mercury and Jupiter will slip into Cancer, and your romantic fifth house of love and passion on June 8 and 9. Valerie Mesa, People.com, 6 June 2025 See All Example Sentences for diary

Word History

Etymology

Latin diarium, from dies day — more at deity

First Known Use

1581, in the meaning defined at sense 1

Time Traveler
The first known use of diary was in 1581

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Cite this Entry

“Diary.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/diary. Accessed 17 Jun. 2025.

Kids Definition

diary

noun
di·​a·​ry ˈdī-(ə-)rē How to pronounce diary (audio)
plural diaries
: a daily record especially of personal experiences and thoughts
also : a book for keeping such a record
Etymology

from Latin diarium "a record of business dealings or activities during the day," from dies "day" — related to meridian, sunday see Word History at sunday

More from Merriam-Webster on diary

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