Pronunciation: (gwäm), [key]
an island, belonging to the U.S., in the N Pacific, E of the Philippines: the largest of the Marianas group; U.S. naval station. 84,996; 206 sq. mi. (535 sq. km). Cap.: Agaña. Abbr.: GU (for use with zip code).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.