|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: 165 000 (2004 est). Area: 541 sq km (209 sq miles)|
A self-governing island territory of the United States, located in the western Pacific Ocean. With important naval and air bases, Guam is an American military bastion in the Pacific.