/ Dictionary / Index C composition of forces: Meaning and Definition of Find definitions for: composi'tion of forc'es Pronunciation: [key] — Mech. Mech. the union or combination of two or more forces into a single force. Cf. parallelogram law, parallelogram of forces. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. composition composition series Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language