an island in the N Pacific, the largest and southernmost of the Marianas: belonged to Spain from the 17th century until 1898, when it wasceded 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)
Guam in American English
(gwɑm)
largest of the Mariana Islands, in the W Pacific: an unincorporated territory of the U.S.: 209 sq mi (541 sq km); pop. 155,000; cap. Agana