/ Dictionary / Index P parallel projection: Meaning and Definition of Find definitions for: par'allel projec'tion Pronunciation: [key] — Geom. Geom. a projection from one plane to a second plane in which the lines joining points on the first plane and corresponding images are parallel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. parallel postulate parallel rulers 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