/ Dictionary / Index G gro.: Meaning and Definition of Find definitions for: gro. Pronunciation: [key] gross. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. grizzly bear groan Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language