A daily log of experiences, especially those of the writer. / (Britain, Canada) A personal organizer or appointment diary.

(obsolete) Lasting for one day.

(intransitive) To keep a diary or journal.

present participle of diary

plural of diary

simple past tense and past participle of diary

a small personal notebook in which one makes a note of future planned events, engagements, appointments, etc., so as not to forget them.

A sketchbook.

A diary kept in electronic format; an Internet journal.

The traditional first line of a diary entry, based on the first line of a formal letter.