Dictionary.com
Thesaurus.com
Synonyms

diary

American  
[dahy-uh-ree] / ˈdaɪ ə ri /

noun

  • diaries
    plural
  1. a daily record, usually private, especially of the writer's own experiences, observations, feelings, attitudes, etc.

    Synonyms:
    chronicle, log, daybook, journal
  2. a book for keeping such a record.

    Synonyms:
    chronicle, log, daybook, journal
  3. a book or pad containing pages marked and arranged in calendar order, in which to note appointments and the like.


diary British  
/ ˈdaɪərɪ /

noun

  1. a personal record of daily events, appointments, observations, etc

  2. 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

Other Word Forms

Noun Inflected Forms

Etymology

Origin of diary

1575–85; < Latin diārium daily allowance, journal, equivalent to di ( ēs ) day + -ārium -ary

Explanation

Dear diary, you are a written record of things that happen each day. Some people keep a diary while they’re traveling, others keep their secrets in a diary. Either way, keep out! Some diaries have a pretty cover and a tiny lock with a key, for keeping the contents safe from prying eyes. You can also call such a book a "journal," although traditionally a diary is written in each day, while a journal might have less frequent entries. The word diary comes from the Latin word diarium, "daily allowance," with its root of dies, or "day."

Keep Reading on Vocabulary.com

Vocabulary lists containing diary

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

After I read the diary, my efforts to evaluate the government’s response shifted from assessing operational efficacy to diagnosing a crisis of institutional legitimacy.

From The Wall Street Journal Aug. 18, 2026

Det Con Tom Ryan said the discovery of the diary entry was a "game-changer"

From BBC Aug. 6, 2026

Prior to the hearing, Paul released thousands of pages of the immunologist's personal diary.

From Barron's Aug. 6, 2026

Rather, the deeply personal and varied work—textiles, furniture, drawing and prints, videos and installations—adds up to an intimate diary of an artist for whom art and life have always been inseparable.

From The Wall Street Journal Aug. 3, 2026

Rather than leave the diary behind in his room, Father Julien carries it with him under his robes.

From "At Last She Stood" by Erin Entrada Kelly

Anthony Fauci’s diaries tell us what we already knew: Behind every public official’s confident assertions is a fallible human being.

From The Wall Street Journal Aug. 18, 2026

The answer seems clear to me: The only professionals who keep diaries believe that future historians are going to be interested in them.

From The Wall Street Journal Jul. 31, 2026

In her teenage years, she doodled poems in her diaries and made up verses about physics to help her remember things for her exams.

From BBC Jul. 26, 2026

Carter worked as a PA for business executives and, as well as keeping their diaries in order, began making sure their homes were too.

From BBC Jun. 28, 2026

On each occasion, he was either reading or scribbling in his diaries.

From "The Long-Lost Home" by Maryrose Wood

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training