rio bravo rio • rio de janeiro · · · Info · Definitions · Characters · · rio bravo · · Text Common · · Latin · · Scripts 9 · · Length 3 · · Syllables Definitions · · · (noun) a North American river; boundary between the United States and Mexico; flows into Gulf of Mexico. Synonyms: Rio Grande, Rio Bravo. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 b latin small letter b U+0062 i latin small letter i U+0069 o latin small letter o U+006F r latin small letter r U+0072 v latin small letter v U+0076