a river that flows into an ocean or sea (a river that flows into another river or body of water is called a rivière) / a continuous and unstoppable stream of people, things, or words / a river god, or the allegorical artistic representation of a river as an old, bearded man lying on reeds and holding or leaning on an urn from which the river's water flows

novel sequence; family saga

(dated) Blue River

(figuratively) bed of roses, smooth sailing

plural of fleuve