Meaning of “river” - Learner’s Dictionary

river

noun [ C ] us uk /ˈrɪvər/
Extra Examples
The bridge arched over the river.Dangerous chemicals were accidentally released into the river.The river flows from the Andes to the ocean.He waded across the river.The train careered off a bridge and plunged into the river.

A1 a long, natural area of water that flows across the land and into a sea, lake, or another river:

the River Thames
Two major rivers flow through the town.

(Definition of “river” from the Cambridge Learner’s Dictionary © Cambridge University Press)