/ree"oh grand", gran"dee, grahn"day/ for 1; Port. /rddee'oo grddahonn"di/ for 2, 3
1. Mexican, Rio Bravo . a river flowing from SW Colorado through central New Mexico and along the boundary between Texas and Mexico into the Gulf of Mexico. 1800 mi. (2900 km) long.
2. a river flowing W from SE Brazil into the Paraná River. 650 mi. (1050 km) long.
3. Also called Rio Grande do Sul . See São Pedro do Río Grande do Sul .