/ Dictionary / Index P plane angle: Meaning and Definition of Find definitions for: plane' an'gle Pronunciation: [key] — Math. Math. an angle between two intersecting lines. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. plane plane geometry 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