- Word History
|part of speech:
||a midwestern U.S. state between North Dakota and Nebraska. (abbr.: SD)
||South Dakotan (n.)
means "allies" or "friends" in a Sioux language. The Dakota Territory was named after the Dakota Sioux, one of several Native American nations from that area. The Dakota Territory was divided into South Dakota and North Dakota when they became states in 1889.