- Any one of numerous species of fishes belonging to Salmo,
Salvelinus, and allied genera of the family Salmonidae. They are highly
esteemed as game fishes and for the quality of their flesh. All the
species breed in fresh water, but after spawning many of them descend
to the sea if they have an opportunity. - Any one of several species of marine fishes more or less
resembling a trout in appearance or habits, but not belonging to the
same family, especially the California rock trouts, the common
squeteague, and the southern, or spotted, squeteague; -- called also
salt-water trout, sea trout, shad trout, and gray trout. See
Squeteague, and Rock trout under Rock.