Definition of river
1a
: a natural stream of water of usually considerable volume
b
: watercourse
2a
: something resembling a river
a river of lava
b
rivers plural
: large or overwhelming quantities
drank rivers of coffee
up the river
: to or in prison
was sent up the river
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Merriam-Webster unabridged
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Time Traveler for river
The first known use of river was in the 14th century
See more words from the same century