/ Dictionary / Index G Great Britain: Meaning and Definition of Find definitions for: Great" Brit'ain Pronunciation: [key] an island of NW Europe, separated from the mainland by the English Channel and the North Sea: since 1707 the name has applied politically to England, Scotland, and Wales. 46,417,600; 88,139 sq. mi. (228,280 sq. km). Cf. United Kingdom. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. great blue shark great bustard Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language