1.nounA large and often winding stream which drains a land mass, carrying water down from higher areas to a lower point, oftentimes ending in another body of water, such as an ocean or in an inland sea.
"Occasionally rivers overflow their banks and cause floods."
2.nounAny large flow of a liquid in a single body.
"a river of blood"
3.nounThe last card dealt in a hand.
4.nounA visually undesirable effect of white space running down a page, caused by spaces between words on consecutive lines happening to coincide.
5.verbTo improve one’s hand to beat another player on the final card in a poker game.
"Johnny rivered me by drawing that ace of spades."