/ Dictionary / Index A Atacama Desert: Meaning and Definition of Find definitions for: A'ta•ca'ma Des'ert Pronunciation: (at'u-kam'u, at"-, ä'tu-kä'mu, ä"tu- Sp. ä"tä-kä'mä), [key] an arid region in N Chile: rich nitrate deposits. ab. 600 mi. (960 km) long; ab. 70,000 sq. mi. (181,300 sq. km). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Atabrine atacamite Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language