/ Dictionary / Index G groma: Meaning and Definition of Find definitions for: gro•ma Pronunciation: (grō'mu), [key] — n. an instrument having a cruciform wooden frame with a plumb line at the end of each arm, used for laying out lines at right angles to existing lines. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Grolier de Servières grommet 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