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 dairy. 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."

Definitions of diary

n a daily written record of (usually personal) experiences and observations

blog, web log
a shared on-line journal where people can post diary entries about their personal experiences and hobbies
Type of:
piece of writing, writing, written material
the work of a writer; anything expressed in letters of the alphabet (especially when considered from the point of view of style and effect)

n a personal journal (as a physical object)

Type of:
a record book as a physical object

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