estuary/ˈɛstjʊəɹi/EtymologyFrom Latin aestuarium (“creek”, “estuary of a river”).estuary means Estuary English Lexicurio rates it Rare gem — a strength score of 79 out of 100.nameEstuary English“Many of them would move to the new private housing estates springing up further east along the Thames Corridor, where they would learn to 'speak Estuary'.”nounA coastal water body where ocean tides and river water merge, resulting in a brackish water zone.“The railway then follows the widening estuary of the river, which at high tide has the appearance of a lake, but at low water presents a rather cheerless expanse of dark mud.”An ocean inlet also fed by fresh river water.