/ Dictionary / Index G Gran Chaco: Meaning and Definition of Find definitions for: Gran Cha•co Pronunciation: (grän chä'kô), [key] an extensive subtropical region in central South America, in Argentina, Bolivia, and Paraguay. 300,000 sq. mi. (777,000 sq. km). Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Gran Canaria grand Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language