Definition of Rio Grande
1\ˌrē-(ˌ)ō-ˈgrand, -ˈgran-dē also ˌrī-ō-ˈgrand\play or Mexican Spanish Río Bravo \ˌrē-(ˌ)ō-ˈbrä-(ˌ)vō\play river 1885 miles (3034 kilometers) long in the southwestern U.S. forming the boundary between Mexico and Texas and flowing from the San Juan Mountains in southwestern Colorado to the Gulf of Mexico
3\ˌrē-(ˌ)ō-ˈgrän-dā, -dē\ municipality in northeastern Puerto Rico east-southeast of San Juan population 54,304
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