Definition of estuary
: a water passage where the tide meets a river current; especially : an arm of the sea at the lower end of a river
Examples of estuary in a sentence
the city sits on the shores of a deep estuary where the Hudson River meets the Atlantic Ocean
Did You Know?
A partly enclosed coastal body of water in which river water is mixed with seawater is called an estuary. An estuary is thus defined by salinity rather than geography. Many coastal features designated by other names are in fact estuaries (for instance, Chesapeake Bay). Some of the oldest continuous civilizations have flourished in estuarine environments (for example, the Tigris and Euphrates rivers, the Nile delta, and the Ganges delta). Cities such as London (Thames River), New York (Hudson River), and Montreal (St. Lawrence River) developed on estuaries and became important commercial centers.
Origin and Etymology of estuary
Latin aestuarium, from aestus boiling, tide; akin to Latin aestas summer — more at edify
First Known Use: 1538
ESTUARY Defined for English Language Learners
Definition of estuary for English Language Learners
: an area where a river flows into the sea
ESTUARY Defined for Kids
Definition of estuary for Students
: an arm of the sea at the lower end of a river
Seen and Heard
What made you want to look up estuary? Please tell us where you read or heard it (including the quote, if possible).