any of various species of trout inhabiting salt water, as the salmon trout, Salmo trutta.
2.
any of several fishes of the genus Cynoscion.
Origin
1735-45
Examples from the web for sea trout
Spring is trophy rockfish season and rockfish and sea trout abound during the autumn.
Lagoon charters typically bring in sea trout and redfish.
The inland waterway offers protected waters for sea trout, flounder and several other sought after fish.
Spotted sea trout have a pair of enlarged canine teeth in their upper jaw and the lower jaw is projecting, as in a weakfish.
There is also a mix of spot, small sea trout, small bluefish and flounder as part of that fishing.
Bluefish, spot and large sea trout are also making a solid presence in the region.
British Dictionary definitions for sea trout
sea trout
noun
1.
a silvery marine variety of the brown trout that migrates to fresh water to spawn Compare brown trout
2.
any of several marine sciaenid fishes of the genus Cynoscion, such as C. nebulosus (spotted sea trout) and the weakfish, of North American coastal waters