/ Dictionary / Index T TGG: Meaning and Definition of Find definitions for: TGG Pronunciation: [key] transformational-generative grammar. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. TG TGIF Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language