/ Dictionary / Index G gyro horizon: Meaning and Definition of Find definitions for: gy'ro hori'zon Pronunciation: ( jī'rō), [key] — Aeron. Aeron. See(def. 3). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gyrofrequency gyroidal Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language