Definitions:

1. A river or stream that runs parallel to a larger river for a significant distance before eventually joining it. NOUN
   • The small stream became a yazoo tributary, running along the Mississippi River before joining it miles downstream.
2. A river that rises in west central Mississippi and flows southwast to empty into the Mississippi River above Vicksburg. NOUN
   • The Yazoo River flows through Mississippi, carrying a significant amount of water to the Gulf of Mexico.