/ Dictionary / Index P planing hull: Meaning and Definition of Find definitions for: plan'ing hull" Pronunciation: [key] — Naut. Naut. a hull that tends to rise from the water when under way so that no significant amount of water is displaced beyond a certain speed. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. planimetry planish Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language