/ Dictionary / Index T Trojan group: Meaning and Definition of Find definitions for: Tro'jan group" Pronunciation: [key] — Astron. Astron. a group of asteroids oscillating about either of two points, equidistant from the sun and Jupiter, that forms an equilateral triangle with the sun and Jupiter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Trojan Trojan horse Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language