/ Dictionary / Index V virtual particle: Meaning and Definition of Find definitions for: vir'tual par"ticle Pronunciation: [key] — Physics. Physics. an elementary particle of transitory existence that does not appear as a free particle in a particular situation but that can transmit a force from one particle to another. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. virtually virtual reality Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language