What does diarize mean?
Diarize is a verb meaning to record an appointment, task, or event in a diary, planner, or calendar, particularly so that a future commitment is not forgotten. It is formed from 'diary' plus the suffix '-ize', which converts nouns into verbs of action. The word is most at home in British English and in administrative, legal, and business settings everywhere, where phrases like 'diarize the hearing' or 'diarize a follow-up' signal careful organization and professionalism. It can also describe the broader habit of keeping a diary — writing down daily events and reflections as they happen. The tone is efficient rather than literary: someone who says they will diarize a meeting is promising to make sure it happens. Though less common in American speech, where 'calendar it' or 'pencil it in' may be used instead, diarize remains a precise and useful word for the act of committing plans to paper or screen.
verbTo record or note something in a diary, planner, or calendar; especially to enter a future event or appointment so that it is not forgotten.
- To enter a future appointment, task, or reminder into a diary or calendar.
- More generally, to record events or observations in a diary as they occur.
"Let me diarize the follow-up call for next Tuesday."
"Please diarize the quarterly review for the first week of October."
"She diarizes her travels meticulously, capturing each day's impressions."
'Diarize' turns your calendar into a verb — the polite office way of saying 'I'll write that down before I forget.'
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of diarize
Diarize derives from the noun 'diary', which entered English in the late sixteenth century from Latin 'diarium', itself from 'dies', meaning day — literally a record of one's days. The verb was formed by adding '-ize', a productive Greek-derived suffix used to turn nouns into verbs of action. Its cognates include 'diarist' (a person who keeps a diary) and 'diurnal' (daily), both tracing back to the same Latin root.
Related word forms
How diarize is actually used
Common in British English and in professional or administrative contexts worldwide, where it carries a slightly formal, organized tone. In American English it is understood but less frequent, with 'pencil it in' or 'put it on my calendar' often preferred.
Easily confused with diarize
Despite the similar spelling, 'diarize' means to record something in a diary, whereas 'diarrhea' is a medical condition; the two share no meaning and only superficial letters.