Definitions
American Heritage® Dictionary of the English Language, Fourth 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.
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.
Wiktionary
- 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.
GNU Webster's 1913
- 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.
WordNet 3.0
- 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.
Examples
“Anna had underlined the word diary in her notebook.”
“Between your excellent analysis in the VA -02 and your insights and ideas here, your diary is already “written.””
“(Of course, if your diary is a Livejournal, it talks back to you in many voices ...)”
March Books 6) Harry Potter and the Chamber of Secrets, by J.K. Rowling
“But with this difference: a diary is almost always a private matter.”
“Telling Scott he should leave stuff in his diary is almost as bad as telling him to leave stuff out, like you said its his, let him pick what he wants to leave in or out.”
EXTRALIFE – By Scott Johnson - Diary #23: “No More Politics”
“This diary is a love letter written by a new mother named Suzanne for her baby son, Nicholas.”
“I light a spirit-lamp, and make some coffee, and he open the dead man's book -- it is what they call a diary -- and begin to read.”
“Police also seized what they described as diary writings about the RCMP, oil and gas, and an entry from the year 2000 about Karman Willis.”
“Oh yes I remember you saying about next week - I'm off work so my diary is pretty flexible for both days and evenings.”
“A diary is an outlet for your most private thoughts, a very personal way of writing.”
Lists
These user-created lists contain the word ‘diary’.
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One word book titles
More popular books often have shorter titles. Here is a list of one word book titles
blink, Freakonomics, roots, sugar, banjo, rising, cane, crave, emotions, love, until, dune and 118 more...
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Time
clock, forever, never, ever, ago, when, then, now, past, present, future, timeline and 119 more...
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Keep track of that
items used to record or track things
log, diary, journal, wordnik, nyctograph, notebook, seismograph, timecard, list, sticky note

bilby "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'. Apr 25, 2009