/ Dictionary / Index S strong interaction: Meaning and Definition of Find definitions for: strong' interac'tion Pronunciation: [key] — Physics. Physics. the interaction between gluons and between gluons and quarks that is responsible for the strong force. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. stronghold strongman Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language