[kol-uh-rad-oh, -rah-doh; for 4 also Sp. kaw-law-rah-th
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. |
| Col·o·ra·do (kŏl'ə-rād'ō, -rä'dō) Abbr. CO or Col. or Colo. A state of the west-central United States. It was admitted as the 38th state in 1876. First explored by the Spanish in the 16th and 17th centuries, the region was added to the United States through the Louisiana Purchase (1803) and a cession by Mexico (1848). The Colorado Territory was organized in 1861. Denver is the capital and the largest city. Population: 4,860,000. Col'o·ra'dan, Col'o·ra'do·an adj. & n. |
| Colorado, Río A river of central Argentina rising in the Andes and flowing about 853 km (530 mi) southeast to the Atlantic Ocean. |
State in the west-central United States in the Rocky Mountains, bordered by Wyoming and Nebraska to the north, Nebraska and Kansas to the east, Oklahoma and New Mexico to the south, and Utah to the west. Its capital and largest city is Denver.
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