/ Dictionary / Index P plane sailing: Meaning and Definition of Find definitions for: plane' sail'ing Pronunciation: [key] — Navig. Navig. sailing on a course plotted without reference to the curvature of the earth. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. planer tree planet Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language