n.
Pronunciation: ' es-ch ə - ˌ wer- ē , ' esh-
Function: noun
Inflected Form: plural -ar · ies
Etymology: Latin aestuarium, from aestus boiling, tide; akin to Latin aestas summer ― more at EDIFY
Date: 1538
: a water passage where the tide meets a river current especially : an arm of the sea at the lower end of a river