Definitions of Columbus:

• noun:   a city in western Georgia on the Chattahoochee River; industrial center
• noun:   a town in eastern Mississippi near the border with Alabama
• noun:   the state capital of Ohio; located in the center of the state; site of Ohio State University
• noun:   Italian navigator who discovered the New World in the service of Spain while looking for a route to China (1451-1506)
• name:  A male given name (rare: 1 in 20000 males; popularity rank in the U.S.: #1026)
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #10939)