/ Dictionary / Index P planform: Meaning and Definition of Find definitions for: plan•form Pronunciation: (plan'fôrm"), [key] — n. the outline of an object viewed from above. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. planet X plangent Related Content Daily Word Quiz: cygnet Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language