/ Dictionary / Index P parallel forces: Meaning and Definition of Find definitions for: par'allel forc'es Pronunciation: [key] — Mech. Mech. forces acting along parallel lines of action. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. parallel evolution parallelism Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language