noun
1. : any of various trouts or chars that as adults inhabit the sea but ascend rivers to spawn ; especially : a European fish ( Salmo trutta ) that resembles the salmon but is smaller, weaker, and with smaller scales, that occurs in numerous subspecies in different regions which are sometimes considered separate species, and that may often become landlocked
2. : any of various marine fishes that more or less resemble trouts: as
a. : weakfish 1
b. : greenling 1
c. : the queenfish of California