An estuary is the place in the water where a tide and a river current meet, like the estuary at New York Harbor, where the Hudson River meets the Atlantic Ocean.

Estuary, pronounced "ES-choo-air-ee," comes from the Latin word aestuarium, meaning "a tidal marsh or opening." The calm waters of an estuary, where the mouth of a river connects with the open sea and fresh water mixes with salty ocean water, makes the perfect home for many species of aquatic plants and animals. Chesapeake Bay and Puget Sound are estuaries.

Definitions of estuary

n the wide part of a river where it nears the sea; fresh and salt water mix

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an estuary in central northeastern England formed by the Ouse River and the Trent River
Para River
an estuary in northern Brazil into which the Tocantins River flows
Rio de la Plata
an estuary between Argentina and Uruguay
Firth of Clyde
a firth on the southwestern coast of Scotland emptying into the North Channel
Firth of Forth
a large firth on the east coast of Scotland and the estuary of the Forth River; location of Edinburgh
Moray Firth
an inlet of the North Sea on the northeast coast of Scotland
Solway Firth
a large firth on the west coast of Britain between England and Scotland
a long narrow estuary (especially in Scotland)
Type of:
body of water, water
the part of the earth's surface covered with water (such as a river or lake or ocean)

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