/ Dictionary / Index G Gy,: Meaning and Definition of Find definitions for: Gy Pronunciation: [key] — Physics. Physics. gray. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Gwynedd gybe Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language