/ Dictionary / Index D dyn: Meaning and Definition of Find definitions for: dyn Pronunciation: [key] — Physics. Physics. dyne; dynes. dyn. Pronunciation: [key] dynamics. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dymaxion dyna- Related Content Daily Word Quiz: garrulous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language