A river mouth refers to the place where a river flows into a larger body of water, such as a lake, sea, or ocean. It is the point of termination of a river, where the freshwater from the river meets the saltwater of the larger water body. River mouths often form estuaries, which are areas of brackish water where the river's current is slowed and sediment and nutrients are deposited. River mouths can vary in shape and size, depending on factors such as the slope of the land and the volume of water flowing through the river.
