Added 9 October 2026 planner /ˈplænɚ/ noun Categories: PeopleThingsUncommon Words In Latin: mētātor Wiktionary noun ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about planner at Wordnik → Where our words come from → A person who makes plans. A notebook for recording appointments and things to be done, etc. Related Words: devisercontriverschemeconsultantorganizingagendaorganizerplottermastermindorganiserschedulerguide Back to today's word