an island in the N Pacific, the largest and southernmost of the Marianas: belonged to Spain from the 17th century until 1898, when it was ceded to the US; site of naval and air force bases. Capital: Agana (now officially spelt Hagåtña). Pop: 160 378 (2013 est). Area: 541 sq km (209 sq miles)
WordReference Random House Unabridged Dictionary of American English © 2025
Guam
(gwäm),USA pronunciation n. Gua•ma•ni•an
(gwä mā′nē ən),USA pronunciation n., adj.
- Place Namesan 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).
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