Definition of "Colorado" :

noun: a state in west central United States in the Rocky Mountains

noun: an important river in the southwestern United States; rises in the Rocky Mountains of northern Colorado and flows southwest through Utah into Arizona (where it flows through the Grand Canyon) and then southward through the southern tip of Nevada, then forming the border between California and Arizona and finally into Mexico where it empties into the Gulf of California; the main source of water in the southwestern United States

noun: a river in Texas; flows southeast into the Gulf of Mexico