/ Dictionary / Index G ground-to-ground: Meaning and Definition of Find definitions for: ground-to-ground Pronunciation: (ground'tu-ground'), [key] — adj., adv. surface-to-surface. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ground-to-air ground track Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language