- a river flowing E from E Wyoming through Nebraska to the Missouri. 431 miles (692 km) long.
Examples from the Web for niobrara
Historical Examples of niobrara
From that point we passed down to the mouth of the Niobrara.Mary and I
Stephen Return Riggs
At its mouth, where it empties into the Niobrara, it is 165 feet wide.
A bridge has been built across the Niobrara, due north of Ainsworth.
Over it lies the bluish-gray Niobrara shale, in which natural cement is found.North Dakota
For Niobrara River (l'eau qui court), see our volume v, p. 90, note 54.