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