guam guallatiri • guama · · · Info · Definitions · Characters · · guam · · Text Latin · · Script 4 · · Length 2 · · Syllables Definitions · · · (noun) the largest and southernmost island in the Marianas which is administered as a territory of the United States; it was ceded by Spain to the United States in 1898. Synonyms: Guam, GU. · · Noun Definition 1 Characters · · a latin small letter a U+0061 g latin small letter g U+0067 m latin small letter m U+006D u latin small letter u U+0075