/ Dictionary / Index P planner: Meaning and Definition of Find definitions for: plan•ner Pronunciation: (plan'ur), [key] — n. a person who plans. a book, similar to a desk calendar, for recording appointments, things to be done, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: planner (Thesaurus) Planned Parenthood planning Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language