A river of North America which rises in the Rocky Mountains of south-western Colorado and flows 3,030 km (1,880 miles) generally south-eastwards to the Gulf of Mexico, forming the US–Mexico frontier from El Paso to the sea.
Definition of Rio Grande in US English:
Rio Grande
proper nounˌrēō ˈɡrand
A river in North America that rises in the Rocky Mountains of southwestern Colorado and flows 1,880 miles (3,030 km) southeast to the Gulf of Mexico, forming the US–Mexico border from El Paso to the gulf.