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English definition of “river”

river

noun [C] uk   /ˈrɪv.ər/ us    //
A1 a natural wide flow of fresh water across the land into the sea, a lake, or another river: We sailed slowly down the river.Watercourses and waterfalls A1 (written abbreviation R) used usually before, sometimes after, the name of a river: the River ThamesWatercourses and waterfalls up (the) river in the opposite direction to the flow of water in the river: We sailed up river.Watercourses and waterfalls down (the) river in the same direction as the flow of water in the riverWatercourses and waterfalls
(Definition of river from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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