/ Dictionary / Index G Gt. Br.: Meaning and Definition of Find definitions for: Gt. Br. Pronunciation: [key] Great Britain. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. GT g.t.c. Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language