also: かわぐち
noun, noun which may take the genitive case particle 'no'
river mouth; estuary
Refers to the point where a river flows into a larger body of water; used in geography, news, and everyday contexts.
河口付近には干潟が広がっている。
Tidal flats spread out near the river mouth.
その川は河口で海に注
The river flows into the sea at its mouth.