/ Dictionary / Index G grounder: Meaning and Definition of Find definitions for: ground•er Pronunciation: (groun'dur), [key] — n. Baseball. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: grounder (Thesaurus) ground-effect machine ground fault Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language