aw]
| 1. | a state in the W United States. 2,888,834; 104,247 sq. mi. (270,000 sq. km). Capital: Denver. Abbreviation: CO (for use with zip code), Col., Colo. |
| 2. | a river flowing SW from N Colorado through Utah and Arizona into the Gulf of California: Grand Canyon; Boulder Dam. 1450 mi. (2335 km) long. |
| 3. | a river flowing SE from W Texas to the Gulf of Mexico. 840 mi. (1350 km) long. |
| 4. | Rí⋅o [ree-oh; Sp. ree-aw] , a river in central Argentina, flowing SE from the Andes to the Atlantic Ocean. 530 mi. (853 km) long. |