/ Dictionary / Index G Great Dog: Meaning and Definition of Find definitions for: Great' Dog' Pronunciation: [key] — Astron. Astron. the constellation Canis Major. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Great Dividing Range great doxology Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language