(in Wales and Ireland) another name for sea trout (sense 1)
Word origin
C16: origin unknown
sea trout in British English
or seatrout
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
Examples of 'sewin' in a sentence
sewin
The menu features lamb and rosemary cake with spring greens and sewin trout pancakes with dill yoghurt.
Times, Sunday Times (2006)
A net is strung between the small round boats, often at night, to catch sewin as they move upstream.