diary /ˈdaɪ.ə.ɹi/noun 2adjective 1verb 1forms 3 noun2 •a book where someone writes down each day what they did and feltThey kept separate diaries. His was on paper and her diary was on her computer's hard drive. •(UK, Canada) A personal organizer or appointment diary.It is recommended that teachers and pupils are issued with homework diaries to help implement and monitor the homework timetable. — 2004 adjective1 •(no longer used) Lasting for one day.the offer of a usurpation, though it were but as a diary ague — 1605 verb1 •To keep a diary or journal.As part of her mindful movement practise, diarying is important to Sarah. "It gives me a chance to see what is going on, to reflect on my experience." — 2015 formsdiaried · diarying · diaries