- a state in the W United States. 104,247 sq. mi. (270,000 sq. km). Capital: Denver. Abbreviation: CO (for use with zip code), Col., Colo.
- a river flowing SW from N Colorado through Utah and Arizona into the Gulf of California: Grand Canyon; Boulder Dam. 1450 miles (2335 km) long.
- a river flowing SE from W Texas to the Gulf of Mexico. 840 miles (1350 km) long.
- Rí·o [ree-oh; Spanish ree-aw] /ˈri oʊ; Spanish ˈri ɔ/, a river in central Argentina, flowing SE from the Andes to the Atlantic Ocean. 530 miles (853 km) long.
- a state of the central US: consists of the Great Plains in the east and the Rockies in the west; drained chiefly by the Colorado, Arkansas, South Platte, and Rio Grande Rivers. Capital: Denver. Pop: 4 550 688 (2003 est). Area: 269 998 sq km (104 247 sq miles)Abbreviation: Colo., (with zip code) CO
- a river in SW North America, rising in the Rocky Mountains and flowing southwest to the Gulf of California: famous for the 1600 km (1000 miles) of canyons along its course. Length: about 2320 km (1440 miles)
- a river in central Texas, flowing southeast to the Gulf of Mexico. Length: about 1450 km (900 miles)
- a river in central Argentina, flowing southeast to the Atlantic. Length: about 850 km (530 miles)
Word Origin for Colorado
U.S. state (organized as a territory 1861, admitted as a state 1876), named for the river, Spanish Rio Colorado, from colorado "ruddy, reddish," literally "colored," past participle of colorar "to color, dye, paint," from Latin colorare (see coloration).
River in the southwestern United States, with its headwaters in the Rocky Mountains of northern Colorado, that flows generally southwest through Colorado, Utah, and Arizona; forms the border between Nevada and Arizona and Arizona and California; and then flows through Mexico, emptying into the Gulf of California.