Definition of: Red River

1. A river in Texas, Arkansas, and Louisiana, flowing 1.018 miles east to the Mississippi.
2. A river in the United States and Canada, flowing 545 miles north from NW Minnesota through Manitoba to Lake Winnipeg: also Red River of the North.
3. The longest river of Northern Vietnam, flowing 730 miles SE from Yünnan province, China, to the Gulf of Tonkin: Annamese Song Coi. Chinese Yü·an Chiang (yü·än′jyäng′) or Hung Ho (hng′ hu′).