plural diaries
1
: a book in which you write down your personal experiences and thoughts each day
His diaries [=journals] were published after his death.
She kept a diary [=wrote regularly in her diary] while she was traveling in Europe.
2
British
: datebook
Cite this Entry
“Diary.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/diary. Accessed 20 Jun. 2026.
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