Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A daily record, especially a personal record of events, experiences, and observations; a journal.
  • n. A book for use in keeping a personal record, as of experiences.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A daily log of experiences, especially those of the writer.
  • n. The method or media used to keep such experiences.
  • n. A calendar or appointment book.
  • adj. Lasting for one day.

from the GNU version of the Collaborative International Dictionary of English

  • n. A register of daily events or transactions; a daily record; a journal; a blank book dated for the record of daily memoranda
  • adj. lasting for one day.

from The Century Dictionary and Cyclopedia

  • Lasting for one day: as, a diary fever.
  • n. [= Sp. Pg. It. diario, ⟨ L. diarium, a daily allowance for soldiers, LL. also a diary, neut. of *diarius, adj., ⟨ dies, day: see dial, deity. The synonym journal is of the same ult. origin.]
  • n. An account of daily events or transactions; a journal; specifically, a daily record kept by a person of any or all matters within his experience or observation: as, a diary of the weather; a traveler's diary.
  • n. A book prepared for keeping a diary; especially, a book with blank leaves bearing printed dates for a daily record, often including other printed matter of current use or interest: as, a lawyers' diary.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a personal journal (as a physical object)
  • n. a daily written record of (usually personal) experiences and observations

Etymologies

Latin diārium, daily allowance, daily journal, from diēs, day; see dyeu- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin diārium ("a daily allowance for soldiers, Late Latin also a diary"), neuter of * diarius, from dies ("a day"). (Wiktionary)

Examples

Comments

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  • "November 21, 1943

    My Diary: Sunny early morning, rush to hang blankets out to dry.

    Alf Fildes' Diary: Began sunny but developed into the usual rain.

    Regimental Diary: At mid-day 19 Battery reported 2 guns ready for action. Bombard fired. Little improvement in weather.

    Mrs Gronks Diary: Cat died. Cancelled milk."
    - Spike Milligan, 'Mussolini: My Part In His Downfall'.

    April 25, 2009