/ Dictionary / Index P plancer: Meaning and Definition of Find definitions for: plan•cer Pronunciation: (plan'sur), [key] — n. the soffit of a cornice, esp. one of wood. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. planation planch Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language